Luận án Nghiên cứu phương pháp xác định hằng số cân bằng của các acid-Base trong dung dịch nước từ kết quả chuẩn độ điện thế

1,447.10-6 -7,168.10-4 1,992 4,00 3,070 1,538 1,114.10-6 -6,519.10-4 1,899 5,00 3,120 1,592 9,159.10-7 -6,389.10-4 1,678 6,00 3,180 1,631 7,119.10-7 -5,934.10-4 1,517 7,00 3,250 1,662 5,254.10-7 -5,297.10-4 1,391 7,20 3,260 1,676 5,061.10-7 -5,287.10-4 1,333 7,50 3,290 1,673 4,402.10-7 -4,918.10-4 1,342 7,80 3,310 1,688 4,050.10-7 -4,801.10-4 1,280 8,00 3,320 1,704 3,903.10-7 -4,797.10-4 1,217 8,50 3,380 1,695 2,946.10-7 -4,127.10-4 1,252 9,00 3,400 1,744 2,764.10-7 -4,216.10-4 1,053 10,00 3,490 1,786 1,870.10-7 -3,621.10-4 0,880 11,00 3,600 1,825 1,151.10-7 -2,950.10-4 0,720 12,00 3,740 1,863 6,168.10-8 -2,235.10-4 0,564 13,00 3,910 1,911 2,892.10-8 -1,596.10-4 0,366 14,00 4,190 1,955 8,150.10-9 -8,780.10-5 0,185 14,60 4,510 1,982 1,892.10-9 -4,319.10-5 0,076 Ka1 = (8,81 ± 1,75).10-3 → pKa1 = 2,055 ± 0,086 Ka2 = (4,33 ± 1,12).10-4 → pKa2 = 3,364 ± 0,112 12.1.2. Từ dung dịch 2 (DD2) VKOH pH Q Y X1 X2 0,00 2,840 1,385 2,893.10-6 -7,914.10-4 2,529 1,00 2,880 1,437 2,498.10-6 -8,207.10-4 2,313 2,00 2,930 1,464 2,020.10-6 -7,754.10-4 2,205 3,00 2,980 1,495 1,640.10-6 -7,387.10-4 2,073 4,00 3,030 1,533 1,335.10-6 -7,084.10-4 1,919 5,00 3,090 1,554 1,027.10-6 -6,417.10-4 1,831 6,00 3,140 1,605 8,421.10-7 -6,237.10-4 1,625 7,00 3,200 1,642 6,536.10-7 -5,766.10-4 1,472 7,50 3,240 1,647 5,453.10-7 -5,299.10-4 1,452 7,80 3,260 1,658 5,007.10-7 -5,149.10-4 1,405 8,00 3,270 1,671 4,820.10-7 -5,133.10-4 1,351 8,20 3,280 1,685 4,640.10-7 -5,116.10-4 1,296 8,50 3,300 1,698 4,264.10-7 -4,978.10-4 1,243 9,00 3,340 1,712 3,576.10-7 -4,632.10-4 1,185 10,00 3,420 1,750 2,530.10-7 -4,061.10-4 1,027 11,00 3,510 1,791 1,710.10-7 -3,478.10-4 0,861 12,00 3,620 1,828 1,052.10-7 -2,829.10-4 0,705 13,00 3,760 1,865 5,633.10-8 -2,141.10-4 0,553 14,00 3,930 1,912 2,639.10-8 -1,526.10-4 0,362 15,00 4,210 1,955 7,432.10-9 -8,383.10-5 0,185 15,60 4,520 1,982 1,807.10-9 -4,222.10-5 0,075 15,80 4,700 1,991 7,926.10-10 -2,815.10-5 0,038 Ka1 = (1,03 ± 0,15).10-2 → pKa1 = 1,987 ± 0,063 Ka2 = (4,29 ± 0,81).10-4 → pKa2 = 3,367 ± 0,082 12.1.3. Từ dung dịch 3 (DD3) VKOH pH Q Y X1 X2 0,00 2,820 1,365 3,126.10-6 -7,856.10-4 2,612 1,00 2,860 1,411 2,689.10-6 -8,077.10-4 2,421 2,00 2,910 1,431 2,166.10-6 -7,555.10-4 2,337 3,00 2,950 1,483 1,867.10-6 -7,718.10-4 2,124 4,00 3,000 1,513 1,513.10-6 -7,300.10-4 2,003 5,00 3,050 1,548 1,230.10-6 -6,952.10-4 1,858 6,00 3,110 1,568 9,449.10-7 -6,280.10-4 1,775 7,00 3,160 1,615 7,732.10-7 -6,063.10-4 1,580 8,00 3,220 1,651 5,994.10-7 -5,584.10-4 1,435 8,20 3,240 1,646 5,451.10-7 -5,294.10-4 1,454 8,50 3,250 1,672 5,286.10-7 -5,377.10-4 1,350 8,80 3,270 1,682 4,850.10-7 -5,213.10-4 1,308 9,00 3,290 1,679 4,417.10-7 -4,961.10-4 1,318 9,50 3,320 1,704 3,905.10-7 -4,801.10-4 1,215 10,00 3,360 1,718 3,274.10-7 -4,464.10-4 1,158 11,00 3,440 1,755 2,314.10-7 -3,905.10-4 1,005 12,00 3,530 1,795 1,563.10-7 -3,339.10-4 0,844 13,00 3,630 1,839 1,010.10-7 -2,800.10-4 0,663 14,00 3,770 1,873 5,402.10-8 -2,111.10-4 0,522 15,00 3,940 1,917 2,527.10-8 -1,498.10-4 0,343 16,00 4,220 1,957 7,105.10-9 -8,209.10-5 0,178 16,60 4,520 1,983 1,809.10-9 -4,227.10-5 0,070 16,80 4,700 1,991 7,927.10-10 -2,816.10-5 0,036 17,00 5,000 2,000 2,000.10-10 -1,423.10-5 0,002 Ka1 = (9,04 ± 0,97).10-3 → pKa1 = 2,044 ± 0,047 Ka2 = (4,36 ± 0,61).10-4 → pKa2 = 3,360 ± 0,060 12.1.4. Từ dung dịch 4 (DD4) VKOH pH Q Y X1 X2 0,00 2,800 1,349 3,390.10-6 -7,886.10-4 2,673 1,00 2,840 1,390 2,905.10-6 -8,030.10-4 2,506 2,00 2,880 1,433 2,490.10-6 -8,122.10-4 2,331 3,00 2,930 1,451 2,003.10-6 -7,547.10-4 2,256 4,00 2,970 1,499 1,721.10-6 -7,618.10-4 2,058 5,00 3,020 1,527 1,393.10-6 -7,166.10-4 1,944 6,00 3,070 1,560 1,130.10-6 -6,788.10-4 1,808 7,00 3,130 1,580 8,681.10-7 -6,118.10-4 1,727 8,00 3,180 1,625 7,091.10-7 -5,875.10-4 1,543 8,50 3,210 1,641 6,237.10-7 -5,624.10-4 1,477 8,80 3,230 1,648 5,714.10-7 -5,433.10-4 1,446 9,00 3,240 1,659 5,492.10-7 -5,396.10-4 1,403 9,20 3,250 1,669 5,279.10-7 -5,359.10-4 1,359 9,50 3,270 1,678 4,840.10-7 -5,187.10-4 1,322 10,00 3,310 1,686 4,045.10-7 -4,786.10-4 1,289 11,00 3,380 1,724 2,996.10-7 -4,296.10-4 1,135 12,00 3,450 1,770 2,228.10-7 -3,890.10-4 0,945 13,00 3,540 1,806 1,503.10-7 -3,312.10-4 0,795 14,00 3,650 1,841 9,226.10-8 -2,680.10-4 0,654 15,00 3,770 1,885 5,437.10-8 -2,140.10-4 0,472 16,00 3,960 1,917 2,305.10-8 -1,432.10-4 0,341 17,00 4,230 1,958 6,791.10-9 -8,035.10-5 0,171 17,60 4,530 1,983 1,727.10-9 -4,131.10-5 0,069 17,80 4,710 1,991 7,569.10-10 -2,751.10-5 0,038 18,00 4,990 1,999 2,094.10-10 -1,456.10-5 0,002 Ka1 = (9,43 ± 0,95).10-3 → pKa1 = 2,025 ± 0,044 Ka2 = (4,35 ± 0,57).10-4 → pKa2 = 3,361 ± 0,057 12.1.5. Từ dung dịch 5 (DD5) VKOH pH Q Y X1 X2 0,00 2,780 1,339 3,687.10-6 -8,003.10-4 2,718 1,00 2,820 1,374 3,148.10-6 -8,064.10-4 2,572 2,00 2,860 1,411 2,689.10-6 -8,086.10-4 2,419 3,00 2,900 1,451 2,299.10-6 -8,079.10-4 2,257 4,00 2,950 1,468 1,848.10-6 -7,471.10-4 2,188 5,00 2,990 1,513 1,584.10-6 -7,470.10-4 2,002 6,00 3,040 1,539 1,280.10-6 -6,998.10-4 1,895 7,00 3,090 1,570 1,038.10-6 -6,601.10-4 1,766 8,00 3,140 1,607 8,433.10-7 -6,260.10-4 1,615 9,00 3,200 1,632 6,498.10-7 -5,679.10-4 1,512 9,50 3,230 1,648 5,713.10-7 -5,430.10-4 1,448 9,80 3,250 1,655 5,234.10-7 -5,244.10-4 1,418 10,00 3,260 1,665 5,028.10-7 -5,204.10-4 1,377 10,50 3,290 1,684 4,430.10-7 -4,996.10-4 1,298 11,00 3,320 1,705 3,906.10-7 -4,803.10-4 1,213 12,00 3,390 1,740 2,887.10-7 -4,290.10-4 1,070 13,00 3,470 1,773 2,036.10-7 -3,730.10-4 0,932 14,00 3,560 1,809 1,372.10-7 -3,172.10-4 0,786 15,00 3,660 1,849 8,850.10-8 -2,645.10-4 0,620 16,00 3,800 1,881 4,724.10-8 -1,988.10-4 0,490 17,00 3,970 1,921 2,205.10-8 -1,405.10-4 0,326 18,00 4,240 1,960 6,490.10-9 -7,864.10-5 0,165 18,60 4,540 1,983 1,650.10-9 -4,037.10-5 0,069 18,80 4,710 1,991 7,570.10-10 -2,752.10-5 0,037 19,00 4,980 1,999 2,192.10-10 -1,490.10-5 0,003 Ka1 = (1,03 ± 0,09).10-2 → pKa1 = 1,985 ± 0,036 Ka2 = (4,31 ± 0,46).10-4 → pKa2 = 3,365 ± 0,046 PHỤ LỤC 13: XÁC ĐỊNH HSCB CỦA H2DSA ACID THEO KĨ THUẬT 2 Chuẩn độ lần lượt V0 = 20,00 mL dung dịch HCl (DDHCl) 2,627.10-2 M và dung dịch hỗn hợp (DDhh) gồm HCl 2,627.10-2 M và H2DSA 2,569.10-2 M bằng dung dịch KOH 1,054.10-1 M ở lực ion I = 1,00. PL13.1. Kết quả chuẩn độ điện thế VKOH V V 0,00 1,735 0,00 1,565 7,60 2,249 0,20 1,759 0,20 1,579 7,80 2,276 0,40 1,781 0,40 1,594 8,00 2,302 0,60 1,806 0,60 1,607 8,20 2,331 0,80 1,830 0,80 1,621 8,40 2,358 1,00 1,856 1,00 1,636 8,60 2,387 1,20 1,882 1,20 1,647 8,80 2,419 1,40 1,909 1,40 1,665 9,00 2,449 1,60 1,938 1,60 1,676 9,20 2,480 1,80 1,967 1,80 1,694 9,40 2,504 2,00 2,003 2,00 1,709 9,60 2,527 2,20 2,038 2,20 1,722 9,80 2,552 2,40 2,071 2,40 1,738 10,00 2,578 2,60 2,112 2,60 1,755 10,20 2,604 2,80 2,150 2,80 1,771 10,40 2,636 3,00 2,199 3,00 1,787 10,60 2,679 3,20 2,252 3,20 1,801 10,80 2,724 3,40 2,305 3,40 1,819 11,00 2,768 3,60 2,369 3,60 1,834 11,20 2,815 3,80 2,441 3,80 1,851 11,40 2,862 4,00 2,529 4,00 1,870 11,60 2,910 4,20 2,634 4,20 1,887 11,80 2,961 4,40 2,769 4,40 1,905 12,00 3,011 4,60 2,962 4,60 1,924 12,20 3,062 4,70 3,108 4,80 1,942 12,40 3,115 4,80 3,318 5,00 1,962 12,60 3,169 4,90 3,740 5,20 1,980 12,80 3,225 5,00 10,175 5,40 2,002 13,00 3,281 5,10 10,767 5,60 2,021 13,20 3,339 5,80 2,039 13,40 3,398 6,00 2,061 13,60 3,459 6,20 2,084 13,80 3,521 6,40 2,107 14,00 3,725 6,60 2,126 14,20 3,994 6,80 2,153 14,40 4,215 7,00 2,174 14,60 4,949 7,20 2,199 14,80 9,175 7,40 2,223 15,00 9,950 PL13.2 Kết quả xác định HSCB của H2DSA pH V1 V2 Q Y X1 X2 1,738 0,025 2,40 0,608 2,032.10-4 1,020.10-2 5,720 1,755 0,167 2,60 0,619 1,912.10-4 9,547.10-3 5,677 1,771 0,309 2,80 0,629 1,805.10-4 8,955.10-3 5,635 1,787 0,448 3,00 0,640 1,706.10-4 8,375.10-3 5,590 1,801 0,560 3,20 0,658 1,646.10-4 7,693.10-3 5,514 1,819 0,708 3,40 0,666 1,534.10-4 7,207.10-3 5,481 1,834 0,831 3,60 0,682 1,464.10-4 6,645.10-3 5,418 1,851 0,962 3,80 0,694 1,379.10-4 6,136.10-3 5,366 1,870 1,108 4,00 0,702 1,278.10-4 5,714.10-3 5,332 1,887 1,237 4,20 0,715 1,204.10-4 5,259.10-3 5,280 1,905 1,370 4,40 0,727 1,126.10-4 4,841.10-3 5,232 1,924 1,503 4,60 0,738 1,048.10-4 4,440.10-3 5,185 1,942 1,628 4,80 0,752 9,822.10-5 4,036.10-3 5,129 1,962 1,766 5,00 0,762 9,075.10-5 3,701.10-3 5,088 1,980 1,872 5,20 0,780 8,553.10-5 3,280.10-3 5,014 2,002 1,994 5,40 0,794 7,865.10-5 2,922.10-3 4,957 2,021 2,103 5,60 0,811 7,364.10-5 2,562.10-3 4,886 2,039 2,206 5,80 0,830 6,933.10-5 2,216.10-3 4,809 2,061 2,339 6,00 0,840 6,343.10-5 1,979.10-3 4,767 2,084 2,463 6,20 0,853 5,792.10-5 1,728.10-3 4,715 2,107 2,576 6,40 0,868 5,306.10-5 1,464.10-3 4,650 2,126 2,674 6,60 0,888 4,969.10-5 1,196.10-3 4,571 2,153 2,812 6,80 0,896 4,430.10-5 1,039.10-3 4,536 2,174 2,898 7,00 0,918 4,121.10-5 7,782.10-4 4,445 2,199 3,000 7,20 0,936 3,744.10-5 5,748.10-4 4,372 2,223 3,091 7,40 0,957 3,426.10-5 3,681.10-4 4,287 2,249 3,189 7,60 0,975 3,098.10-5 1,985.10-4 4,211 2,276 3,291 7,80 0,993 2,785.10-5 5,580.10-5 4,140 2,302 3,389 8,00 1,011 2,516.10-5 -7,650.10-5 4,065 2,331 3,481 8,20 1,030 2,244.10-5 -2,009.10-4 3,985 2,358 3,566 8,40 1,052 2,023.10-5 -3,228.10-4 3,897 2,387 3,650 8,60 1,073 1,806.10-5 -4,265.10-4 3,810 2,419 3,739 8,80 1,093 1,587.10-5 -5,046.10-4 3,727 2,449 3,818 9,00 1,115 1,411.10-5 -5,840.10-4 3,636 2,480 3,889 9,20 1,140 1,250.10-5 -6,593.10-4 3,535 2,504 3,943 9,40 1,168 1,147.10-5 -7,512.10-4 3,418 2,527 3,995 9,60 1,197 1,057.10-5 -8,353.10-4 3,298 2,552 4,044 9,80 1,227 9,660.10-6 -9,081.10-4 3,175 2,578 4,093 10,00 1,257 8,776.10-6 -9,663.10-4 3,054 2,604 4,143 10,20 1,286 7,967.10-6 -1,014.10-3 2,933 2,636 4,203 10,40 1,313 7,017.10-6 -1,029.10-3 2,825 2,679 4,267 10,60 1,338 5,868.10-6 -1,008.10-3 2,721 2,724 4,333 10,80 1,362 4,856.10-6 -9,742.10-4 2,620 2,768 4,399 11,00 1,387 4,037.10-6 -9,403.10-4 2,519 2,815 4,448 11,20 1,416 3,319.10-6 -9,068.10-4 2,400 2,862 4,496 11,40 1,445 2,728.10-6 -8,702.10-4 2,282 2,910 4,546 11,60 1,473 2,230.10-6 -8,290.10-4 2,165 2,961 4,599 11,80 1,501 1,796.10-6 -7,800.10-4 2,052 3,011 4,634 12,00 1,533 1,457.10-6 -7,400.10-4 1,919 3,062 4,668 12,20 1,565 1,176.10-6 -6,977.10-4 1,787 3,115 4,703 12,40 1,597 9,405.10-7 -6,526.10-4 1,655 3,169 4,729 12,60 1,632 7,493.10-7 -6,095.10-4 1,513 3,225 4,756 12,80 1,666 5,911.10-7 -5,647.10-4 1,373 3,281 4,782 13,00 1,700 4,661.10-7 -5,218.10-4 1,233 3,339 4,805 13,20 1,735 3,642.10-7 -4,795.10-4 1,089 3,398 4,819 13,40 1,773 2,835.10-7 -4,399.10-4 0,935 3,459 4,833 13,60 1,810 2,186.10-7 -4,007.10-4 0,782 3,521 4,848 13,80 1,847 1,677.10-7 -3,633.10-4 0,629 3,725 4,896 14,00 1,875 6,651.10-8 -2,346.10-4 0,515 3,994 4,904 14,20 1,914 1,967.10-8 -1,319.10-4 0,355 4,215 4,907 14,40 1,954 7,259.10-9 -8,278.10-5 0,190 Ka1 = (1,60 ± 0,01).10-2 → pKa1 = 1,796 ± 0,002 Ka2 = (4,26 ± 0,02).10-4 → pKa2 = 3,371 ± 0,002 PHỤ LỤC 14: XÁC ĐỊNH HSCB CỦA H2MeBrSA ACID THEO KĨ THUẬT 1 Chuẩn độ V0 = 20,00 mL dung dịch H2MeBrSA có nồng độ lần lượt là 7,650.10-4 M (DD1); 8,325.10-4 M (DD2) bằng dung dịch KOH 6,193.10-3 M ở lực ion I = 0,10. PL14. 1. Kết quả chuẩn độ điện thế VKOH VKOH 0,00 3,269 3,258 5,20 7,620 6,423 0,40 3,354 3,340 5,60 9,300 8,045 0,80 3,455 3,434 6,00 9,753 9,376 1,20 3,574 3,541 6,40 9,999 9,768 1,60 3,720 3,675 6,80 10,169 9,989 2,00 3,904 3,841 7,20 10,281 10,136 2,40 4,129 4,045 7,60 10,391 10,247 2,80 4,373 4,259 8,00 10,468 10,330 3,20 4,619 4,512 8,40 10,532 10,403 3,60 4,863 4,745 8,80 10,587 10,460 4,00 5,139 4,985 9,20 10,630 10,512 4,40 5,467 5,278 9,60 10,671 10,554 4,80 6,051 5,685 10,00 10,706 10,594 PL14.2. Kết quả xác định HSCB của H2MeBrSA (a) Từ dung dịch 1 (DD1) VKOH pH1 Q Y X1 X2 0,00 3,269 0,912 2,643.10-7 6,136.10-5 3,071 0,40 3,354 0,928 1,821.10-7 4,151.10-5 3,027 0,80 3,455 0,943 1,162.10-7 2,610.10-5 2,984 1,20 3,574 0,965 6,861.10-8 1,218.10-5 2,922 1,60 3,720 0,997 3,627.10-8 7,957.10-7 2,832 2,00 3,904 1,042 1,626.10-8 -6,859.10-6 2,703 2,40 4,129 1,113 6,157.10-9 -1,087.10-5 2,504 2,80 4,373 1,215 2,181.10-9 -1,182.10-5 2,215 3,20 4,619 1,343 7,762.10-10 -1,068.10-5 1,855 3,60 4,863 1,485 2,797.10-10 -8,623.10-6 1,454 4,00 5,139 1,634 8,615.10-11 -5,967.10-6 1,033 Ka1 = (3,03 ± 0,15).10-3 → pKa1 = 2,519 ± 0,021 Ka2 = (4,81 ± 0,42).10-6 → pKa2 = 5,317 ± 0,038 (b) Từ dung dịch 2 (DD2) VKOH pH2 Q Y X1 X2 0,00 3,258 0,861 2,629.10-7 9,988.10-5 3,216 0,40 3,340 0,876 1,834.10-7 7,381.10-5 3,174 0,80 3,434 0,894 1,215.10-7 5,045.10-5 3,121 1,20 3,541 0,921 7,628.10-8 2,936.10-5 3,045 1,60 3,675 0,951 4,258.10-8 1,344.10-5 2,961 2,00 3,841 0,991 2,061.10-8 1,691.10-6 2,848 2,40 4,045 1,050 8,535.10-9 -5,840.10-6 2,681 2,80 4,259 1,139 3,465.10-9 -9,966.10-6 2,429 3,20 4,512 1,246 1,182.10-9 -9,818.10-6 2,128 3,60 4,745 1,372 4,451.10-10 -8,689.10-6 1,772 4,00 4,985 1,507 1,619.10-10 -6,814.10-6 1,391 4,40 5,278 1,647 4,588.10-11 -4,425.10-6 0,997 Ka1 = (2,23 ± 0,09).10-3 → pKa1 = 2,651 ± 0,017 Ka2 = (3,18 ± 0,62).10-6 → pKa2 = 5,497 ± 0,084 PHỤ LỤC 15: XÁC ĐỊNH HSCB CỦA H2MeBrSA ACID THEO KĨ THUẬT 2 Chuẩn độ lần lượt V0 = 20,00 mL các dung dịch nghiên cứu bằng dung dịch KOH 9,290.10-3 M ở lực ion I = 0,10: (1) dung dịch HCl (DDHCl) 3,091.10-3 M (2) dung dịch hỗn hợp (DDhh) gồm HCl 3,091.10-3 M và H2MeBrSA 5,763.10-4 M PL15.1. Kết quả chuẩn độ điện thế VKOH VKOH 0,00 2,623 2,588 6,40 4,134 3,442 0,40 2,658 2,620 6,80 9,529 3,581 0,80 2,695 2,653 7,20 10,142 3,773 1,20 2,734 2,687 7,60 10,381 4,081 1,60 2,775 2,723 8,00 10,530 4,641 2,00 2,819 2,761 8,40 10,639 5,204 2,40 2,866 2,800 8,80 10,723 5,787 2,80 2,916 2,841 9,20 10,792 9,118 3,20 2,971 2,885 9,60 10,041 3,60 3,032 2,932 10,00 10,310 4,00 3,099 2,984 10,40 10,471 4,40 3,177 3,038 10,80 10,585 4,80 3,268 3,099 11,20 10,674 5,20 3,379 3,166 11,60 10,745 5,60 3,524 3,243 12,00 10,805 6,00 3,734 3,336 PL15.2. Kết quả xác định HSCB của H2MeBrSA pH V1 V2 Q Y X1 X2 2,653 0,343 0,80 0,483 2,386.10-6 1,491.10-3 4,282 2,687 0,714 1,20 0,505 2,133.10-6 1,320.10-3 4,221 2,723 1,087 1,60 0,522 1,871.10-6 1,171.10-3 4,170 2,761 1,459 2,00 0,542 1,633.10-6 1,030.10-3 4,115 2,800 1,823 2,40 0,568 1,431.10-6 8,879.10-4 4,041 2,841 2,187 2,80 0,593 1,234.10-6 7,602.10-4 3,970 2,885 2,549 3,20 0,620 1,053.10-6 6,415.10-4 3,894 2,932 2,905 3,60 0,651 8,930.10-7 5,290.10-4 3,806 2,984 3,275 4,00 0,669 7,216.10-7 4,459.10-4 3,757 3,038 3,626 4,40 0,703 5,918.10-7 3,527.10-4 3,660 3,099 3,985 4,80 0,730 4,636.10-7 2,792.10-4 3,585 3,166 4,333 5,20 0,765 3,562.10-7 2,077.10-4 3,485 3,243 4,678 5,60 0,802 2,621.10-7 1,464.10-4 3,380 3,336 5,030 6,00 0,832 1,775.10-7 1,004.10-4 3,296 3,442 5,361 6,40 0,881 1,150.10-7 5,596.10-5 3,160 3,581 5,694 6,80 0,924 6,381.10-8 2,574.10-5 3,036 3,773 6,027 7,20 0,968 2,759.10-8 7,031.10-6 2,913 4,081 6,324 7,60 1,041 7,171.10-9 -4,445.10-6 2,706 4,641 6,435 8,00 1,272 6,658.10-10 -8,053.10-6 2,056 5,204 6,477 8,40 1,560 6,113.10-11 -4,546.10-6 1,241 Ka1 = (1,58 ± 0,01).10-3 → pKa1 = 2,802 ± 0,002 Ka2 = (4,84 ± 0,77).10-6 → pKa2 = 5,315 ± 0,069 PHỤ LỤC 16: XÁC ĐỊNH HSCB CỦA H3SA ACID THEO KĨ THUẬT 1 Chuẩn độ V0 = 25,00 mL dung dịch H3SA có nồng độ lần lượt là 1,142.10-3 M (DD1); 1,163.10-3 M (DD2); 1,458.10-3 M (DD3); 1,569.10-3 M (DD4); 1,681.10-3 M (DD5) bằng dung dịch KOH 4,609.10-3 M ở lực ion I = 0,10. PL16.1. Kết quả chuẩn độ điện thế VKOH 0,00 3,641 3,667 3,541 3,517 3,474 0,20 3,713 3,742 3,599 3,570 3,531 0,40 3,793 3,821 3,673 3,642 3,598 0,60 3,881 3,906 3,747 3,712 3,651 0,80 3,974 3,994 3,821 3,784 3,715 1,00 4,071 4,089 3,901 3,861 3,775 1,20 4,176 4,189 3,981 3,937 3,846 1,40 4,290 4,297 4,060 4,018 3,917 1,60 4,412 4,417 4,149 4,099 3,980 1,80 4,556 4,552 4,243 4,184 4,057 2,00 4,734 4,717 4,327 4,278 4,129 2,20 4,932 4,921 4,446 4,370 4,200 2,40 5,246 5,227 4,565 4,469 4,284 2,60 5,782 5,676 4,680 4,589 4,364 2,80 6,494 6,377 4,849 4,721 4,456 3,00 7,168 7,031 5,053 4,870 4,552 3,20 7,547 7,431 5,334 5,058 4,651 3,40 7,780 7,671 5,810 5,326 4,772 3,60 7,959 7,850 6,575 5,715 4,895 3,80 8,111 8,002 7,114 6,310 5,078 4,00 8,247 8,132 7,420 6,926 5,348 4,20 8,370 8,245 7,650 7,283 5,732 4,40 8,486 8,359 7,831 7,533 6,161 4,60 8,603 8,467 7,980 7,722 6,780 4,80 8,723 8,576 8,109 7,900 7,102 5,00 8,841 8,685 8,220 8,004 7,415 5,20 8,963 8,797 8,321 8,126 7,585 5,40 9,091 8,915 8,419 8,232 7,737 5,60 9,217 9,031 8,517 8,332 7,862 5,80 9,350 9,156 8,612 8,426 7,977 6,00 9,484 9,283 8,701 8,518 8,077 6,20 9,617 9,414 8,806 8,609 8,159 6,40 9,749 9,549 8,898 8,691 8,237 6,60 9,872 9,684 8,991 8,798 8,324 6,80 9,989 9,815 9,096 8,888 8,401 7,00 10,096 9,935 9,201 8,982 8,473 7,20 10,190 10,045 9,304 9,077 8,549 7,40 10,277 10,117 9,425 9,175 8,623 7,60 10,351 10,199 9,522 9,273 8,691 7,80 10,420 10,260 9,624 9,369 8,773 8,00 10,478 10,330 9,746 9,476 8,837 8,20 10,532 10,390 9,836 9,584 8,923 8,40 10,580 10,443 9,961 9,676 8,992 8,60 10,624 10,493 10,048 9,776 9,072 8,80 10,663 10,538 10,139 9,873 9,156 9,00 10,699 10,575 10,225 9,969 9,228 9,20 10,612 10,297 10,053 9,304 9,40 10,645 10,368 10,126 9,387 9,60 10,672 10,428 10,238 9,457 9,80 10,700 10,477 10,271 9,544 10,00 10,720 10,521 10,336 9,633 10,20 9,707 10,40 9,788 10,60 9,857 10,80 9,937 11,00 10,005 11,20 10,068 11,40 10,133 11,60 10,190 11,80 10,246 12,00 10,298 12,20 10,341 12,40 10,385 12,60 10,424 12,80 10,471 13,00 10,503 13,20 10,534 PL16.2. Kết quả xác định HSCB của H3SA (a) Từ dung dịch 1 (DD1) Trước BNCĐ: VKOH pH Q Y X1 X2 X3 0,00 3,641 0,259 3,096.10-12 5,015.10-8 1,123.10-3 28,300 0,20 3,713 0,294 2,136.10-12 3,430.10-8 9,323.10-4 27,940 0,40 3,793 0,331 1,384.10-12 2,249.10-8 7,587.10-4 27,559 0,60 3,881 0,371 8,441.10-13 1,410.10-8 6,047.10-4 27,147 0,80 3,974 0,415 4,969.10-13 8,544.10-9 4,749.10-4 26,691 1,00 4,071 0,464 2,840.10-13 5,011.10-9 3,682.10-4 26,189 1,20 4,176 0,516 1,529.10-13 2,791.10-9 2,794.10-4 25,654 1,40 4,29 0,571 7,696.10-14 1,464.10-9 2,069.10-4 25,087 1,60 4,412 0,629 3,651.10-14 7,220.10-10 1,499.10-4 24,488 1,80 4,556 0,688 1,479.10-14 3,121.10-10 1,029.10-4 23,870 2,00 4,734 0,750 4,710.10-15 1,104.10-10 6,510.10-5 23,235 2,20 4,932 0,814 1,303.10-15 3,290.10-11 3,914.10-5 22,568 2,40 5,246 0,880 1,608.10-16 5,019.10-12 1,795.10-5 21,894 Ka1 = (6,39 ± 0,07).10-5 → pKa1 = 4,194 ± 0,005 Sau BNCĐ: VKOH pH Q Y X1 X2 X3 3,40 7,780 1,236 5,648.10-24 -8,411.10-17 3,581.10-8 18,219 3,60 7,959 1,308 1,736.10-24 -4,821.10-17 2,147.10-8 17,473 3,80 8,111 1,380 6,411.10-25 -2,955.10-17 1,355.10-8 16,727 4,00 8,247 1,452 2,637.10-25 -1,879.10-17 8,755.10-9 15,982 4,20 8,370 1,524 1,183.10-25 -1,236.10-17 5,729.10-9 15,240 4,40 8,486 1,596 5,559.10-26 -8,239.10-18 3,725.10-9 14,450 4,60 8,603 1,667 2,588.10-26 -5,383.10-18 2,342.10-9 13,761 4,80 8,723 1,738 1,178.10-26 -3,427.10-18 1,398.10-9 13,028 5,00 8,841 1,809 5,425.10-27 -2,180.10-18 7,785.10-10 12,301 5,20 8,963 1,878 2,425.10-27 -1,350.10-18 3,740.10-10 11,583 5,40 9,091 1,947 1,038.10-27 -8,069.10-19 1,222.10-10 10,877 5,60 9,217 2,014 4,497.10-28 -4,836.10-19 -2,308.10-11 10,187 5,80 9,350 2,078 1,852.10-28 -2,787.10-19 -9,808.10-11 9,523 6,00 9,484 2,139 7,554.10-29 -1,589.10-19 -1,2867.10-10 8,891 6,20 9,617 2,196 3,095.10-29 -9,044.10-20 -1,336.10-10 8,303 6,40 9,749 2,247 1,273.10-29 -5,136.10-20 -1,244.10-10 7,773 6,60 9,872 2,293 5,552.10-30 -3,022.10-20 -1,111.10-10 7,299 6,80 9,989 2,332 2,516.10-30 -1,816.10-20 -9,612.10-11 6,898 7,00 10,096 2,364 1,218.10-30 -1,137.10-20 -8,243.10-11 6,564 7,20 10,190 2,392 6,438.10-31 -7,521.10-21 -7,141.10-11 6,280 7,40 10,277 2,413 3,560.10-31 -5,113.10-21 -6,155.10-11 6,065 7,60 10,351 2,432 2,152.10-31 -3,686.10-21 -5,430.10-11 5,869 7,80 10,420 2,445 1,344.10-31 -2,707.10-21 -4,773.10-11 5,733 8,00 10,478 2,459 9,052.10-32 -2,093.10-21 -4,308.10-11 5,588 8,20 10,532 2,469 6,259.10-32 -1,643.10-21 -3,888.10-11 5,484 8,40 10,580 2,478 4,510.10-32 -1,326.10-21 -3,550.10-11 5,388 8,60 10,624 2,486 3,338.10-32 -1,088.10-21 -3,258.10-11 5,311 8,80 10,663 2,494 2,558.10-32 -9,141.10-22 -3,029.10-11 5,226 9,00 10,699 2,501 2,001.10-32 -7,782.10-22 -2,829.10-11 5,152 Ka2 = (2,05 ± 0,13).10-9 → pKa2 = 8,688 ± 0,027 Ka3 = (1,81 ± 0,18).10-11 → pKa3 = 10,742 ± 0,042 (b) Từ dung dịch 2 (DD2) Trước BNCĐ: VKOH pH Q Y X1 X2 X3 0,40 3,821 0,314 1,081.10-12 2,028.10-8 7,187.10-4 27,738 0,60 3,906 0,356 6,814.10-13 1,287.10-8 5,762.10-4 27,302 0,80 3,994 0,402 4,194.10-13 7,964.10-9 4,572.10-4 26,824 1,00 4,089 0,452 2,442.10-13 4,718.10-9 3,561.10-4 26,315 1,20 4,189 0,504 1,366.10-13 2,692.10-9 2,732.10-4 25,772 1,40 4,297 0,559 7,190.10-14 1,455.10-9 2,052.10-4 25,202 1,60 4,417 0,617 3,461.10-14 7,279.10-10 1,495.10-4 24,609 1,80 4,552 0,676 1,494.10-14 3,301.10-10 1,048.10-4 23,994 2,00 4,717 0,737 5,208.10-15 1,253.10-10 6,838.10-5 23,364 2,20 4,921 0,800 1,381.10-15 3,725.10-11 4,062.10-5 22,715 2,40 5,227 0,864 1,802.10-16 6,179.10-12 1,901.10-5 22,052 Ka1 = (5,46 ± 0,01).10-5 → pKa1 = 4,262 ± 0,001 Sau BNCĐ: VKOH pH Q Y X1 X2 X3 3,40 7,671 1,214 1,178.10-23 -1,261.10-16 4,734.10-8 18,445 3,60 7,850 1,285 3,621.10-24 -7,367.10-17 2,851.10-8 17,711 3,80 8,002 1,356 1,337.10-24 -4,571.10-17 1,810.10-8 16,977 4,00 8,132 1,427 5,733.10-25 -3,013.10-17 1,194.10-8 16,244 4,20 8,245 1,498 2,757.10-25 -2,088.10-17 8,064.10-9 15,512 4,40 8,359 1,569 1,314.10-25 -1,411.10-17 5,329.10-9 14,782 4,60 8,467 1,639 6,510.10-26 -9,642.10-18 3,476.10-9 14,054 4,80 8,576 1,709 3,198.10-26 -6,479.10-18 2,178.10-9 13,328 5,00 8,685 1,779 1,568.10-26 -4,309.10-18 1,287.10-9 12,605 5,20 8,797 1,849 7,514.10-27 -2,802.10-18 6,813.10-10 11,888 5,40 8,915 1,918 3,449.10-27 -1,759.10-18 2,833.10-10 11,178 5,60 9,031 1,985 1,603.10-27 -1,107.10-18 3,841.10-11 10,477 5,80 9,156 2,052 6,985.10-28 -6,647.10-19 -1,021.10-10 9,791 6,00 9,283 2,116 2,996.10-28 -3,931.10-19 -1,712.10-10 9,124 6,20 9,414 2,178 1,248.10-28 -2,269.10-19 -1,939.10-10 8,486 6,40 9,549 2,236 5,041.10-29 -1,279.10-19 -1,883.10-10 7,887 6,60 9,684 2,289 2,031.10-29 -7,161.10-20 -1,690.10-10 7,340 6,80 9,815 2,336 8,385.10-30 -4,060.10-20 -1,452.10-10 6,856 7,00 9,935 2,377 3,725.10-30 -2,408.10-20 -1,237.10-10 6,431 7,20 10,045 2,412 1,768.10-30 -1,488.10-20 -1,049.10-10 6,069 7,40 10,117 2,454 1,094.10-30 -1,099.10-20 -9,784.10-11 5,640 7,60 10,199 2,485 6,284.10-31 -7,696.10-21 -8,649.10-11 5,323 7,80 10,260 2,520 4,182.10-31 -5,949.10-21 -8,061.10-11 4,960 8,00 10,330 2,543 2,602.10-31 -4,375.10-21 -7,165.10-11 4,722 8,20 10,390 2,565 1,734.10-31 -3,367.10-21 -6,501.10-11 4,488 8,40 10,443 2,587 1,213.10-31 -2,675.10-21 -5,976.10-11 4,263 8,60 10,493 2,605 8,647.10-32 -2,149.10-21 -5,492.10-11 4,074 8,80 10,538 2,623 6,379.10-32 -1,766.10-21 -5,094.10-11 3,894 9,00 10,575 2,645 4,982.10-32 -1,509.10-21 -4,842.10-11 3,669 9,20 10,612 2,662 3,883.10-32 -1,286.10-21 -4,565.10-11 3,492 9,40 10,645 2,680 3,113.10-32 -1,117.10-21 -4,347.10-11 3,303 9,60 10,672 2,704 2,606.10-32 -1,000.10-21 -4,228.10-11 3,058 9,80 10,700 2,723 2,163.10-32 -8,889.10-22 -4,069.10-11 2,865 10,00 10,720 2,753 1,904.10-32 -8,248.10-22 -4,048.10-11 2,554 Ka2 = (2,39 ± 0,18).10-9 → pKa2 = 8,622 ± 0,033 Ka3 = (3,37 ± 0,28).10-11 → pKa3 = 10,473 ± 0,036 (c) Từ dung dịch 3 (DD3) Trước BNCĐ: VKOH pH Q Y X1 X2 X3 1,00 3,901 0,401 7,946.10-13 1,225.10-8 5,669.10-4 26,837 1,20 3,981 0,439 5,008.10-13 7,933.10-9 4,602.10-4 26,443 1,40 4,060 0,481 3,175.10-13 5,107.10-9 3,735.10-4 26,015 1,60 4,149 0,523 1,868.10-13 3,113.10-9 2,958.10-4 25,578 1,80 4,243 0,567 1,059.10-13 1,832.10-9 2,311.10-4 25,120 2,00 4,327 0,615 6,425.10-14 1,107.10-9 1,841.10-4 24,628 2,20 4,446 0,662 3,048.10-14 5,640.10-10 1,355.10-4 24,148 2,40 4,565 0,710 1,434.10-14 2,784.10-10 9,911.10-5 23,644 2,60 4,680 0,761 6,967.10-15 1,354.10-10 7,313.10-5 23,117 2,80 4,849 0,812 2,304.10-15 4,892.10-11 4,749.10-5 22,596 3,00 5,053 0,864 6,009.10-16 1,389.10-11 2,843.10-5 22,061 3,20 5,334 0,916 9,121.10-17 2,329.10-12 1,418.10-5 21,516 Ka1 = (6,93 ± 0,06).10-5 → pKa1 = 4,159 ± 0,004 Sau BNCĐ: VKOH pH Q Y X1 X2 X3 4,80 8,109 1,366 6,434.10-25 -2,873.10-17 1,392.10-8 16,871 5,00 8,220 1,423 3,123.10-25 -1,994.10-17 9,829.10-9 16,287 5,20 8,321 1,479 1,611.10-25 -1,417.10-17 7,019.10-9 15,704 5,40 8,419 1,536 8,497.10-26 -1,008.10-17 4,995.10-9 15,121 5,60 8,517 1,592 4,492.10-26 -7,110.10-18 3,507.10-9 14,540 5,80 8,612 1,648 2,412.10-26 -5,026.10-18 2,431.10-9 13,961 6,00 8,701 1,704 1,344.10-26 -3,615.10-18 1,664.10-9 13,384 6,20 8,806 1,759 6,743.10-27 -2,410.10-18 1,063.10-9 12,812 6,40 8,898 1,815 3,684.10-27 -1,693.10-18 6,628.10-10 12,241 6,60 8,991 1,869 1,989.10-27 -1,175.10-18 3,765.10-10 11,675 6,80 9,096 1,923 9,909.10-28 -7,691.10-19 1,737.10-10 11,119 7,00 9,201 1,976 4,947.10-28 -5,026.10-19 4,225.10-11 10,571 7,20 9,304 2,028 2,484.10-28 -3,287.10-19 -3,956.10-11 10,035 7,40 9,425 2,078 1,103.10-28 -1,973.10-19 -8,233.10-11 9,525 7,60 9,522 2,127 5,797.10-29 -1,323.10-19 -1,077.10-10 9,018 7,80 9,624 2,173 2,928.10-29 -8,611.10-20 -1,163.10-10 8,538 8,00 9,746 2,214 1,284.10-29 -5,080.10-20 -1,085.10-10 8,117 8,20 9,836 2,255 7,002.10-30 -3,463.10-20 -1,051.10-10 7,690 8,40 9,961 2,285 2,991.10-30 -1,993.10-20 -8,788.10-11 7,387 8,60 10,048 2,317 1,663.10-30 -1,368.10-20 -8,004.10-11 7,056 8,80 10,139 2,342 8,964.10-31 -9,168.10-21 -7,001.10-11 6,799 9,00 10,225 2,361 5,008.10-31 -6,275.10-21 -6,083.10-11 6,595 9,20 10,297 2,380 3,059.10-31 -4,556.10-21 -5,414.10-11 6,401 9,40 10,368 2,393 1,890.10-31 -3,324.10-21 -4,759.10-11 6,268 9,60 10,428 2,405 1,251.10-31 -2,538.10-21 -4,271.10-11 6,140 9,80 10,477 2,421 8,974.10-32 -2,048.10-21 -3,961.10-11 5,980 10,00 10,521 2,436 6,663.10-32 -1,690.10-21 -3,707.10-11 5,825 Ka2 = (1,83 ± 0,27).10-9 → pKa2 = 8,737 ± 0,064 Ka3 = (1,82 ± 0,26).10-11 → pKa3 = 10,740 ± 0,061 (d) Từ dung dịch 4 (DD4) Trước BNCĐ: VKOH pH Q Y X1 X2 X3 0,60 3,712 0,323 2,372.10-12 3,312.10-8 9,196.10-4 27,641 0,80 3,784 0,352 1,571.10-12 2,276.10-8 7,657.10-4 27,342 1,00 3,861 0,383 1,005.10-12 1,520.10-8 6,292.10-4 27,021 1,20 3,937 0,418 6,456.10-13 1,009.10-8 5,163.10-4 26,664 1,40 4,018 0,454 4,012.10-13 6,510.10-9 4,186.10-4 26,286 1,60 4,099 0,494 2,500.10-13 4,170.10-9 3,389.10-4 25,880 1,80 4,184 0,535 1,500.10-13 2,586.10-9 2,708.10-4 25,458 2,00 4,278 0,577 8,450.10-14 1,526.10-9 2,118.10-4 25,025 2,20 4,370 0,621 4,836.10-14 8,963.10-10 1,662.10-4 24,567 2,40 4,469 0,666 2,610.10-14 4,991.10-10 1,279.10-4 24,099 2,60 4,589 0,712 1,222.10-14 2,484.10-10 9,378.10-5 23,627 2,80 4,721 0,759 5,213.10-15 1,130.10-10 6,660.10-5 23,143 3,00 4,870 0,807 1,980.10-15 4,558.10-11 4,543.10-5 22,648 3,20 5,058 0,855 5,750.10-16 1,438.10-11 2,830.10-5 22,145 Ka1 = (8,00 ± 0,12).10-5 → pKa1 = 4,097 ± 0,006 Sau BNCĐ: VKOH pH Q Y X1 X2 X3 4,80 7,900 1,270 2,534.10-24 -5,548.10-17 2,594.10-8 17,863 5,00 8,004 1,323 1,287.10-24 -4,108.10-17 1,894.10-8 17,319 5,20 8,126 1,375 5,780.10-25 -2,730.10-17 1,320.10-8 16,775 5,40 8,232 1,428 2,886.10-25 -1,910.10-17 9,474.10-9 16,233 5,60 8,332 1,481 1,499.10-25 -1,353.10-17 6,835.10-9 15,691 5,80 8,426 1,533 8,082.10-26 -9,712.10-18 4,944.10-9 15,149 6,00 8,518 1,585 4,442.10-26 -6,998.10-18 3,556.10-9 14,609 6,20 8,609 1,637 2,447.10-26 -5,012.10-18 2,521.10-9 14,071 6,40 8,691 1,689 1,433.10-26 -3,716.10-18 1,788.10-9 13,534 6,60 8,798 1,741 7,051.10-27 -2,440.10-18 1,166.10-9 13,002 6,80 8,888 1,792 3,885.10-27 -1,720.10-18 7,589.10-10 12,471 7,00 8,982 1,843 2,087.10-27 -1,187.10-18 4,614.10-10 11,945 7,20 9,077 1,894 1,116.10-27 -8,143.10-19 2,519.10-10 11,425 7,40 9,175 1,943 5,821.10-28 -5,474.10-19 1,072.10-10 10,912 7,60 9,273 1,992 3,022.10-28 -3,657.10-19 1,207.10-11 10,409 7,80 9,369 2,040 1,594.10-28 -2,464.10-19 -4,801.10-11 9,915 8,00 9,476 2,086 7,784.10-29 -1,571.10-19 -8,061.10-11 9,444 8,20 9,584 2,129 3,782.10-29 -9,962.10-20 -9,499.10-11 8,994 8,40 9,676 2,172 2,043.10-29 -6,768.10-20 -1,023.10-10 8,553 8,60 9,776 2,211 1,042.10-29 -4,413.10-20 -9,974.10-11 8,150 8,80 9,873 2,247 5,420.10-30 -2,907.10-20 -9,336.10-11 7,780 9,00 9,969 2,278 2,832.10-30 -1,916.10-20 -8,448.10-11 7,452 9,20 10,053 2,308 1,601.10-30 -1,328.10-20 -7,698.10-11 7,145 9,40 10,126 2,337 9,821.10-31 -9,723.10-21 -7,124.10-11 6,846 9,60 10,238 2,344 4,528.10-31 -5,822.10-21 -5,612.10-11 6,775 9,80 10,271 2,380 3,661.10-31 -5,135.10-21 -5,747.10-11 6,402 10,00 10,336 2,397 2,353.10-31 -3,853.10-21 -5,168.10-11 6,228 Ka2 = (1,83 ± 0,51).10-9 → pKa2 = 8,738 ± 0,122 Ka3 = (1,78 ± 0,63).10-11 → pKa3 = 10,749 ± 0,153 (g) Từ dung dịch 5 (DD5) Trước BNCĐ: VKOH pH Q Y X1 X2 X3 0,40 3,598 0,268 4,304.10-12 6,043.10-8 1,234.10-3 28,212 0,60 3,651 0,293 3,267.10-12 4,570.10-8 1,076.10-3 27,950 0,80 3,715 0,317 2,271.10-12 3,289.10-8 9,156.10-4 27,704 1,00 3,775 0,345 1,632.10-12 2,393.10-8 7,843.10-4 27,418 1,20 3,846 0,372 1,077.10-12 1,655.10-8 6,551.10-4 27,139 1,40 3,917 0,402 7,124.10-13 1,137.10-8 5,462.10-4 26,832 1,60 3,980 0,435 4,992.10-13 8,034.10-9 4,626.10-4 26,489 1,80 4,057 0,467 3,152.10-13 5,311.10-9 3,794.10-4 26,153 2,00 4,129 0,502 2,061.10-13 3,561.10-9 3,141.10-4 25,791 2,20 4,200 0,539 1,354.10-13 2,379.10-9 2,602.10-4 25,414 2,40 4,284 0,575 8,091.10-14 1,488.10-9 2,091.10-4 25,037 2,60 4,364 0,614 4,965.10-14 9,369.10-10 1,693.10-4 24,642 2,80 4,456 0,652 2,795.10-14 5,522.10-10 1,331.10-4 24,245 3,00 4,552 0,692 1,527.10-14 3,147.10-10 1,036.10-4 23,838 3,20 4,651 0,732 8,155.10-15 1,734.10-10 7,995.10-5 23,421 3,40 4,772 0,772 3,731.10-15 8,434.10-11 5,858.10-5 23,003 3,60 4,895 0,814 1,681.10-15 3,916.10-11 4,264.10-5 22,576 Ka1 = (7,80 ± 0,08).10-5 → pKa1 = 4,108 ± 0,004 Sau BNCĐ: VKOH pH Q Y X1 X2 X3 5,40 7,737 1,205 7,412.10-24 -8,917.10-17 4,112.10-8 18,536 5,60 7,862 1,249 3,241.10-24 -6,103.10-17 2,911.10-8 18,077 5,80 7,977 1,294 1,517.10-24 -4,234.10-17 2,102.10-8 17,618 6,00 8,077 1,338 7,862.10-25 -3,076.10-17 1,564.10-8 17,159 6,20 8,159 1,383 4,610.10-25 -2,385.10-17 1,208.10-8 16,701 6,40 8,237 1,427 2,776.10-25 -1,859.10-17 9,370.10-9 16,242 6,60 8,324 1,471 1,569.10-25 -1,374.10-17 7,076.10-9 15,785 6,80 8,401 1,516 9,497.10-26 -1,054.10-17 5,430.10-9 15,328 7,00 8,473 1,560 5,944.10-26 -8,217.10-18 4,181.10-9 14,871 7,20 8,549 1,604 3,616.10-26 -6,247.10-18 3,158.10-9 14,416 7,40 8,623 1,648 2,228.10-26 -4,767.10-18 2,367.10-9 13,961 7,60 8,691 1,692 1,430.10-26 -3,722.10-18 1,771.10-9 13,507 7,80 8,773 1,736 8,327.10-27 -2,712.10-18 1,258.10-9 13,056 8,00 8,837 1,779 5,486.10-27 -2,140.10-18 9,062.10-10 12,604 8,20 8,923 1,823 3,102.10-27 -1,520.10-18 5,978.10-10 12,158 8,40 8,992 1,866 1,972.10-27 -1,164.10-18 3,856.10-10 11,711 8,60 9,072 1,909 1,161.10-27 -8,453.10-19 2,186.10-10 11,270 8,80 9,156 1,951 6,641.10-28 -6,008.10-19 9,696.10-11 10,834 9,00 9,228 1,993 4,126.10-28 -4,504.10-19 1,183.10-11 10,399 9,20 9,304 2,034 2,491.10-28 -3,306.10-19 -4,820.10-11 9,971 9,40 9,387 2,075 1,432.10-28 -2,344.10-19 -8,666.10-11 9,553 9,60 9,457 2,115 9,003.10-29 -1,762.10-19 -1,136.10-10 9,136 9,80 9,544 2,154 5,025.10-29 -1,221.10-19 -1,239.10-10 8,740 10,00 9,633 2,190 2,764.10-29 -8,362.10-20 -1,250.10-10 8,361 10,20 9,707 2,227 1,685.10-29 -6,130.10-20 -1,257.10-10 7,984 10,40 9,788 2,261 9,779.10-30 -4,339.10-20 -1,200.10-10 7,632 10,60 9,857 2,295 6,162.10-30 -3,242.10-20 -1,156.10-10 7,283 10,80 9,937 2,324 3,592.10-30 -2,295.10-20 -1,059.10-10 6,976 11,00 10,005 2,354 2,274.10-30 -1,715.10-20 -9,875.10-11 6,672 11,20 10,068 2,382 1,489.10-30 -1,310.10-20 -9,221.10-11 6,381 11,40 10,133 2,407 9,604.10-31 -9,884.10-21 -8,455.10-11 6,124 11,60 10,190 2,431 6,544.10-31 -7,734.10-21 -7,861.10-11 5,872 11,80 10,246 2,453 4,485.10-31 -6,068.10-21 -7,261.10-11 5,645 12,00 10,298 2,474 3,158.10-31 -4,843.10-21 -6,734.10-11 5,433 12,20 10,341 2,496 2,367.10-31 -4,033.10-21 -6,384.10-11 5,205 12,40 10,385 2,515 1,760.10-31 -3,335.10-21 -5,990.10-11 5,008 12,60 10,424 2,534 1,355.10-31 -2,822.10-21 -5,682.10-11 4,808 12,80 10,471 2,546 9,836.10-32 -2,290.10-21 -5,206.10-11 4,692 13,00 10,503 2,565 7,944.10-32 -2,000.10-21 -5,006.10-11 4,495 13,20 10,534 2,583 6,457.10-32 -1,754.10-21 -4,808.10-11 4,311 Ka2 = (1,87 ± 0,10).10-9 → pKa2 = 8,729 ± 0,024 Ka3 = (1,64 ± 0,18).10-11 → pKa3 = 10,785 ± 0,048 PHỤ LỤC 17. XÁC ĐỊNH HSCB CỦA H3SA ACID THEO KĨ THUẬT 2 Chuẩn độ lần lượt V0 = 25,00 mL các dung dịch nghiên cứu sau bằng dung dịch KOH 1,039.10-2 M ở lực ion I = 0,10: (1) dung dịch HCl (DDHCl) 9,024.10-4 M (2) dung dịch hỗn hợp 1 (DDhh1) gồm HCl 9,024.10-4 M và H3SA 1,110.10-3 M (3) dung dịch hỗn hợp 2 (DDhh2) gồm HCl 9,024.10-4 M và H3SA 1,348.10-3 M (4) dung dịch hỗn hợp 3 (DDhh3) gồm HCl 9,024.10-4 M và H3SA 1,628.10-3 M PL17.1. Kết quả chuẩn độ điện thế VKOH VKOH 0,00 3,071 3,034 3,018 3,028 7,00 8,454 8,310 7,528 0,20 3,115 3,071 3,053 3,056 7,20 8,549 8,402 7,692 0,40 3,171 3,111 3,093 3,092 7,40 8,644 8,505 7,827 0,60 3,231 3,157 3,133 3,130 7,60 8,743 8,529 7,954 0,80 3,302 3,201 3,180 3,172 7,80 8,836 8,601 8,063 1,00 3,384 3,249 3,220 3,215 8,00 8,932 8,699 8,158 1,20 3,483 3,300 3,271 3,260 8,20 9,024 8,841 8,253 1,40 3,607 3,354 3,323 3,309 8,40 9,118 8,939 8,338 1,60 3,785 3,412 3,383 3,360 8,60 9,213 9,034 8,420 1,80 4,058 3,475 3,436 3,414 8,80 9,300 9,127 8,499 2,00 4,838 3,544 3,496 3,473 9,00 9,386 9,206 8,576 2,20 6,290 3,615 3,562 3,531 9,20 9,472 9,314 8,650 2,40 8,550 3,694 3,635 3,593 9,40 9,550 9,410 8,722 2,60 9,379 3,775 3,706 3,658 9,60 9,630 9,504 8,797 2,80 9,717 3,864 3,784 3,729 9,80 9,708 9,584 8,870 3,00 9,914 3,955 3,863 3,797 10,00 9,776 9,678 8,939 3,20 10,043 4,052 3,945 3,872 10,20 9,838 9,765 9,011 3,40 10,149 4,158 4,020 3,949 10,40 9,902 9,859 9,083 3,60 10,236 4,269 4,117 4,025 10,60 9,964 9,912 9,152 3,80 10,312 4,398 4,218 4,107 10,80 10,021 9,987 9,224 4,00 10,373 4,535 4,321 4,191 11,00 10,077 10,056 9,294 4,20 10,430 4,707 4,426 4,281 11,20 10,126 10,110 9,357 4,40 10,472 4,921 4,549 4,375 11,40 10,173 10,182 9,423 4,60 10,519 5,263 4,688 4,476 11,60 10,216 10,229 9,489 4,80 5,738 4,850 4,587 11,80 10,260 10,282 9,551 5,00 6,239 5,072 4,712 12,00 10,297 10,334 9,611 5,20 6,766 5,341 4,854 12,20 10,382 9,669 5,40 7,188 5,847 5,022 12,40 10,427 9,725 5,60 7,494 6,430 5,220 12,60 10,469 9,780 5,80 7,688 7,041 5,472 12,80 10,511 9,834 6,00 7,867 7,438 5,860 13,00 9,886 6,20 8,006 7,656 6,252 13,20 9,935 6,40 8,136 7,843 6,571 13,40 9,983 6,60 8,249 8,014 7,005 13,60 10,073 6,80 8,386 8,132 7,296 13,80 10,116 PL17.2. Kết quả xác định HSCB của H3SA (a) Từ dung dịch HCl và dung dịch hỗn hợp 1 Trước BNCĐ: pH V1 V2 Q Y X1 X2 X3 3,300 0,794 1,20 0,160 2,013.10-11 2,735.10-7 2,603.10-3 29,327 3,354 0,927 1,40 0,186 1,609.10-11 2,068.10-7 2,267.10-3 29,062 3,412 1,057 1,60 0,212 1,232.10-11 1,532.10-7 1,954.10-3 28,788 3,475 1,184 1,80 0,239 8,994.10-12 1,106.10-7 1,665.10-3 28,507 3,544 1,298 2,00 0,271 6,331.10-12 7,713.10-8 1,394.10-3 28,177 3,615 1,409 2,20 0,305 4,353.10-12 5,307.10-8 1,161.10-3 27,833 3,694 1,498 2,40 0,346 2,867.10-12 3,468.10-8 9,443.10-4 27,403 3,775 1,589 2,60 0,387 1,830.10-12 2,240.10-8 7,644.10-4 26,984 3,864 1,658 2,80 0,436 1,115.10-12 1,368.10-8 6,039.10-4 26,479 3,955 1,725 3,00 0,485 6,623.10-13 8,207.10-9 4,742.10-4 25,966 4,052 1,796 3,20 0,533 3,722.10-13 4,764.10-9 3,673.10-4 25,474 4,158 1,826 3,40 0,597 2,004.10-13 2,524.10-9 2,753.10-4 24,815 4,269 1,854 3,60 0,661 1,031.10-13 1,272.10-9 2,034.10-4 24,151 4,398 1,887 3,80 0,723 4,628.10-14 5,733.10-10 1,441.10-4 23,507 4,535 1,922 4,00 0,785 1,949.10-14 2,374.10-10 1,001.10-4 22,874 Ka1 = (6,51 ± 0,28).10-5 → pKa1 = 4,187 ± 0,019 Sau BNCĐ: pH V1 V2 Q Y X1 X2 X3 7,494 2,307 5,60 1,227 4,043.10-23 -3,019.10-16 6,999.10-8 18,313 7,688 2,324 5,80 1,294 1,117.10-23 -1,602.10-16 4,088.10-8 17,618 7,867 2,340 6,00 1,362 3,412.10-24 -8,648.10-17 2,448.10-8 16,918 8,006 2,352 6,20 1,431 1,373.10-24 -5,431.10-17 1,585.10-8 16,204 8,136 2,363 6,40 1,500 5,864.10-25 -3,466.10-17 1,031.10-8 15,487 8,249 2,373 6,60 1,570 2,812.10-25 -2,348.10-17 6,836.10-9 14,763 8,386 2,385 6,80 1,639 1,139.10-25 -1,401.10-17 4,185.10-9 14,050 8,454 2,392 7,00 1,711 7,435.10-26 -1,139.10-17 2,868.10-9 13,310 8,549 2,400 7,20 1,782 4,016.10-26 -8,084.10-18 1,741.10-9 12,581 8,644 2,423 7,40 1,846 2,159.10-26 -5,649.10-18 9,877.10-10 11,918 8,743 2,447 7,60 1,909 1,127.10-26 -3,850.10-18 4,617.10-10 11,261 8,836 2,469 7,80 1,974 6,127.10-27 -2,686.10-18 1,084.10-10 10,598 8,932 2,492 8,00 2,037 3,259.10-27 -1,839.10-18 -1,235.10-10 9,940 9,024 2,514 8,20 2,101 1,780.10-27 -1,278.10-18 -2,711.10-10 9,278 9,118 2,537 8,40 2,165 9,583.10-28 -8,772.10-19 -3,555.10-10 8,620 9,213 2,560 8,60 2,229 5,118.10-28 -5,972.10-19 -3,954.10-10 7,963 9,300 2,581 8,80 2,293 2,887.10-28 -4,210.10-19 -4,146.10-10 7,299 9,386 2,604 9,00 2,356 1,638.10-28 -2,972.10-19 -4,135.10-10 6,647 9,472 2,655 9,20 2,407 9,235.10-29 -2,074.10-19 -3,873.10-10 6,125 9,550 2,701 9,40 2,459 5,506.10-29 -1,502.10-19 -3,654.10-10 5,583 9,630 2,749 9,60 2,511 3,235.10-29 -1,076.10-19 -3,381.10-10 5,049 9,708 2,795 9,80 2,563 1,927.10-29 -7,774.10-20 -3,114.10-10 4,511 9,776 2,860 10,00 2,606 1,225.10-29 -5,841.10-20 -2,867.10-10 4,065 9,838 2,923 10,20 2,650 8,115.10-30 -4,511.10-20 -2,666.10-10 3,610 9,902 2,988 10,40 2,693 5,300.10-30 -3,447.10-20 -2,452.10-10 3,167 9,964 3,078 10,60 2,725 3,494.10-30 -2,639.10-20 -2,222.10-10 2,843 10,021 3,166 10,80 2,756 2,384.10-30 -2,067.10-20 -2,034.10-10 2,515 10,077 3,264 11,00 2,783 1,635.10-30 -1,621.10-20 -1,852.10-10 2,236 10,126 3,357 11,20 2,813 1,178.10-30 -1,315.10-20 -1,717.10-10 1,932 10,173 3,455 11,40 2,839 8,595.10-31 -1,075.10-20 -1,591.10-10 1,658 10,216 3,554 11,60 2,866 6,445.10-31 -8,943.10-21 -1,486.10-10 1,388 10,260 3,663 11,80 2,887 4,791.10-31 -7,386.10-21 -1,376.10-10 1,167 Ka2 = (3,18 ± 0,26).10-9 → pKa2 = 8,497 ± 0,036 Ka3 = (5,35 ± 1,03).10-11 → pKa3 = 10,272 ± 0,084 (b) Từ dung dịch HCl và dung dịch hỗn hợp 2 Trước BNCĐ: pH V1 V2 Q Y X1 X2 X3 3,220 0,563 1,00 0,143 3,129.10-11 4,033.10-7 3,158.10-3 29,501 3,271 0,713 1,20 0,159 2,441.10-11 3,131.10-7 2,785.10-3 29,340 3,323 0,851 1,40 0,178 1,909.10-11 2,408.10-7 2,445.10-3 29,143 3,383 0,998 1,60 0,194 1,377.10-11 1,791.10-7 2,110.10-3 28,975 3,436 1,105 1,80 0,223 1,097.10-11 1,353.10-7 1,838.10-3 28,677 3,496 1,221 2,00 0,249 8,087.10-12 9,918.10-8 1,578.10-3 28,410 3,562 1,327 2,20 0,278 5,718.10-12 7,039.10-8 1,333.10-3 28,113 3,635 1,431 2,40 0,307 3,818.10-12 4,825.10-8 1,108.10-3 27,810 3,706 1,511 2,60 0,344 2,620.10-12 3,294.10-8 9,199.10-4 27,428 3,784 1,599 2,80 0,378 1,681.10-12 2,180.10-8 7,528.10-4 27,074 3,863 1,657 3,00 0,422 1,087.10-12 1,408.10-8 6,107.10-4 26,623 3,945 1,717 3,20 0,465 6,794.10-13 8,939.10-9 4,919.10-4 26,180 4,020 1,772 3,40 0,509 4,434.10-13 5,803.10-9 4,019.10-4 25,721 4,117 1,815 3,60 0,557 2,484.10-13 3,348.10-9 3,110.10-4 25,223 4,218 1,841 3,80 0,611 1,356.10-13 1,847.10-9 2,373.10-4 24,668 4,321 1,867 4,00 0,665 7,237.10-14 9,914.10-10 1,800.10-4 24,116 4,426 1,894 4,20 0,718 3,784.10-14 5,143.10-10 1,357.10-4 23,566 4,549 1,926 4,40 0,769 1,734.10-14 2,386.10-10 9,812.10-5 23,034 4,688 1,962 4,60 0,819 7,071.10-15 9,851.10-11 6,835.10-5 22,517 Ka1 = (7,52 ± 0,11).10-5 → pKa1 = 4,124 ± 0,006 Sau BNCĐ: pH V1 V2 Q Y X1 X2 X3 7,843 2,337 6,40 1,244 3,681.10-24 -6,524.10-17 3,062.10-8 18,130 8,014 2,353 6,60 1,300 1,180.10-24 -3,648.10-17 1,913.10-8 17,553 8,132 2,363 6,80 1,358 5,455.10-25 -2,524.10-17 1,338.10-8 16,959 8,310 2,379 7,00 1,413 1,660.10-25 -1,285.10-17 8,111.10-9 16,385 8,402 2,387 7,20 1,471 9,157.10-26 -9,597.10-18 5,912.10-9 15,784 8,505 2,396 7,40 1,529 4,672.10-26 -6,705.10-18 4,153.10-9 15,186 8,529 2,398 7,60 1,590 4,114.10-26 -6,688.10-18 3,426.10-9 14,563 8,601 2,412 7,80 1,646 2,590.10-26 -5,256.10-18 2,507.10-9 13,985 8,699 2,436 8,00 1,698 1,358.10-26 -3,618.10-18 1,705.10-9 13,444 8,841 2,470 8,20 1,746 5,238.10-27 -2,012.10-18 1,032.10-9 12,945 8,939 2,494 8,40 1,799 2,741.10-27 -1,371.10-18 6,541.10-10 12,406 9,034 2,517 8,60 1,851 1,464.10-27 -9,432.10-19 3,889.10-10 11,865 9,127 2,539 8,80 1,903 7,917.10-28 -6,525.10-19 2,034.10-10 11,323 9,206 2,558 9,00 1,957 4,717.10-28 -4,804.10-19 7,529.10-11 10,769 9,314 2,584 9,20 2,008 2,295.10-28 -3,077.10-19 -1,108.10-11 10,243 9,410 2,618 9,40 2,056 1,211.10-28 -2,072.10-19 -6,142.10-11 9,749 9,504 2,674 9,60 2,095 6,446.10-29 -1,394.10-19 -8,444.10-11 9,340 9,584 2,721 9,80 2,138 3,785.10-29 -1,002.10-19 -1,015.10-10 8,901 9,678 2,777 10,00 2,177 2,013.10-29 -6,722.10-20 -1,050.10-10 8,496 9,765 2,849 10,20 2,210 1,121.10-29 -4,629.10-20 -1,019.10-10 8,156 9,859 2,944 10,40 2,234 5,917.10-30 -3,062.10-20 -9,137.10-11 7,910 9,912 2,998 10,60 2,273 4,175.10-30 -2,475.10-20 -9,450.10-11 7,503 9,987 3,113 10,80 2,289 2,504.10-30 -1,774.10-20 -8,414.10-11 7,338 10,056 3,225 11,00 2,307 1,567.10-30 -1,309.10-20 -7,607.10-11 7,160 10,110 3,326 11,20 2,327 1,089.10-30 -1,037.10-20 -7,171.10-11 6,946 10,182 3,476 11,40 2,330 6,627.10-31 -7,456.10-21 -6,125.10-11 6,919 Ka2 = (1,54 ± 0,20).10-9 → pKa2 = 8,811 ± 0,057 Ka3 = (2,34 ± 0,72).10-11 → pKa3 = 10,631 ± 0,134 (c) Từ dung dịch HCl và dung dịch hỗn hợp 3 Trước BNCĐ: pH V1 V2 Q Y X1 X2 X3 3,215 0,547 1,00 0,123 2,786.10-11 4,223.10-7 3,229.10-3 29,708 3,260 0,682 1,20 0,140 2,322.10-11 3,367.10-7 2,885.10-3 29,534 3,309 0,817 1,40 0,157 1,852.10-11 2,635.10-7 2,554.10-3 29,362 3,360 0,941 1,60 0,176 1,464.10-11 2,035.10-7 2,247.10-3 29,161 3,414 1,061 1,80 0,197 1,126.10-11 1,547.10-7 1,962.10-3 28,947 3,473 1,180 2,00 0,217 8,276.10-12 1,149.10-7 1,693.10-3 28,736 3,531 1,277 2,20 0,243 6,212.10-12 8,502.10-8 1,460.10-3 28,465 3,593 1,377 2,40 0,269 4,470.10-12 6,176.10-8 1,247.10-3 28,203 3,658 1,457 2,60 0,299 3,179.10-12 4,387.10-8 1,055.10-3 27,887 3,729 1,537 2,80 0,330 2,145.10-12 3,026.10-8 8,798.10-4 27,572 3,797 1,609 3,00 0,362 1,473.10-12 2,105.10-8 7,376.10-4 27,236 3,872 1,664 3,20 0,399 9,669.10-13 1,404.10-8 6,066.10-4 26,854 3,949 1,720 3,40 0,436 6,198.10-13 9,249.10-9 4,965.10-4 26,478 4,025 1,776 3,60 0,472 3,973.10-13 6,097.10-9 4,071.10-4 26,102 4,107 1,813 3,80 0,514 2,454.10-13 3,850.10-9 3,279.10-4 25,673 4,191 1,834 4,00 0,559 1,496.10-13 2,369.10-9 2,619.10-4 25,201 4,281 1,857 4,20 0,605 8,680.10-14 1,405.10-9 2,062.10-4 24,734 4,375 1,881 4,40 0,649 4,870.10-14 8,079.10-10 1,607.10-4 24,272 4,476 1,907 4,60 0,694 2,589.10-14 4,434.10-10 1,232.10-4 23,815 4,587 1,936 4,80 0,737 1,278.10-14 2,283.10-10 9,226.10-5 23,367 4,712 1,968 5,00 0,779 5,699.10-15 1,077.10-10 6,687.10-5 22,930 4,854 2,002 5,20 0,821 2,251.10-15 4,547.10-11 4,658.10-5 22,502 Ka1 = (6,09 ± 0,17).10-5 → pKa1 = 4,215 ± 0,012 Sau BNCĐ: pH V1 V2 Q Y X1 X2 X3 7,827 2,336 7,40 1,284 4,242.10-24 -8,168.10-17 3,009.10-8 17,719 7,954 2,347 7,60 1,331 1,829.10-24 -5,309.10-17 2,098.10-8 17,230 8,063 2,357 7,80 1,379 8,925.10-25 -3,677.10-17 1,516.10-8 16,737 8,158 2,365 8,00 1,427 4,792.10-25 -2,675.10-17 1,124.10-8 16,240 8,253 2,374 8,20 1,475 2,570.10-25 -1,922.10-17 8,270.10-9 15,744 8,338 2,381 8,40 1,524 1,475.10-25 -1,431.10-17 6,174.10-9 15,245 8,420 2,388 8,60 1,572 8,639.10-26 -1,072.10-17 4,592.10-9 14,745 8,499 2,395 8,80 1,620 5,160.10-26 -8,080.10-18 3,395.10-9 14,245 8,576 2,406 9,00 1,668 3,120.10-26 -6,099.10-18 2,490.10-9 13,757 8,650 2,424 9,20 1,713 1,922.10-26 -4,630.10-18 1,816.10-9 13,293 8,722 2,441 9,40 1,758 1,199.10-26 -3,533.10-18 1,297.10-9 12,828 8,797 2,460 9,60 1,802 7,326.10-27 -2,649.10-18 8,897.10-10 12,366 8,870 2,477 9,80 1,847 4,535.10-27 -1,999.10-18 5,813.10-10 11,903 8,939 2,494 10,00 1,892 2,884.10-27 -1,532.10-18 3,494.10-10 11,437 9,011 2,511 10,20 1,937 1,796.10-27 -1,155.10-18 1,727.10-10 10,974 9,083 2,529 10,40 1,982 1,117.10-27 -8,685.10-19 4,192.10-11 10,512 9,152 2,545 10,60 2,027 7,093.10-28 -6,610.10-19 -5,363.10-11 10,048 9,224 2,563 10,80 2,072 4,409.10-28 -4,951.10-19 -1,207.10-10 9,587 9,294 2,579 11,00 2,116 2,777.10-28 -3,737.10-19 -1,669.10-10 9,124 9,357 2,595 11,20 2,162 1,836.10-28 -2,909.10-19 -2,005.10-10 8,657 9,423 2,626 11,40 2,201 1,185.10-28 -2,220.10-19 -2,147.10-10 8,245 9,489 2,665 11,60 2,239 7,638.10-29 -1,689.10-19 -2,185.10-10 7,861 9,551 2,702 11,80 2,277 5,062.10-29 -1,308.10-19 -2,195.10-10 7,470 9,611 2,737 12,00 2,315 3,400.10-29 -1,022.10-19 -2,176.10-10 7,075 9,669 2,772 12,20 2,353 2,316.10-29 -8,055.10-20 -2,137.10-10 6,678 9,725 2,808 12,40 2,391 1,598.10-29 -6,397.10-20 -2,079.10-10 6,289 9,780 2,864 12,60 2,422 1,107.10-29 -5,077.10-20 -1,977.10-10 5,968 9,834 2,919 12,80 2,453 7,722.10-30 -4,046.10-20 -1,875.10-10 5,645 9,886 2,972 13,00 2,485 5,462.10-30 -3,254.10-20 -1,780.10-10 5,316 9,935 3,033 13,20 2,514 3,939.10-30 -2,647.10-20 -1,685.10-10 5,017 9,983 3,107 13,40 2,538 2,855.10-30 -2,156.10-20 -1,580.10-10 4,766 10,073 3,257 13,60 2,537 1,532.10-30 -1,424.10-20 -1,282.10-10 4,777 10,116 3,338 13,80 2,559 1,148.10-30 -1,185.10-20 -1,208.10-10 4,552 Ka2 = (2,09 ± 0,07).10-9 → pKa2 = 8,679 ± 0,015 Ka3 = (3,19 ± 0,16).10-11 → pKa3 = 10,496 ± 0,023