In a 020 M Solution of a Diprotic Acid H₂A (Ka₁ =

Multiple Choice

In a 0.20 M solution of a diprotic acid H₂A (Ka₁ = 1.3 × 10^-5 and Ka₂ = 2.7 × 10^-10 at 25°C) ,what is the equilibrium concentration of A^2-?

A) 7.3 × 10^-6 M
B) 2.7 × 10^-10 M
C) 1.6 × 10^-3 M
D) 0.40 M
E) 0.20 M