Question 1
What is the selenide ion concentration [Se
2-] for a 0.400 M H
2Se solution that has the stepwise dissociation constants of
Ka1 = 1.3 × 10
-4 and
Ka2 = 1.0 × 10
-11?
◦ 1.3 × 10
-4 M
◦ 7.2 × 10
-3 M
◦ 5.2 × 10
-5 M
◦ 1.0 × 10
-11 M
Question 2
Which of the following is a weak diprotic acids?
◦ H
CO
2H
◦ HCN
◦ H
2SO
3◦ H
2CO
3