What Is the Selenide Ion Concentration [Se^2-] for a 0

question 106

Multiple Choice

What is the selenide ion concentration [Se^2-] for a 0.400 M H₂Se solution that has the stepwise dissociation constants of K_a1 = 1.3 × 10^-4 and K_a2 = 1.0 × 10^-11?

• A)7.2 × 10^-3 M
• B)1.3 × 10^-4 M
• C)5.2 × 10^-5 M
• D)1.0 × 10^-11 M