Diprotic acid dissociation reactions

H₂A H⁺ + HA^-, first proton dissociation constant, KA1

HA^-H⁺ + A^2-, second proton dissociation constant, K_A2

C_T = [H₂A] + [HA^-] + [A^2-]

Derive and express ionization factions (₀, ₁ and ₂) as function of hydrogen ion concentration ([H+]).

Here, ₀ = [H₂A]/C_T, _{1 =} [HA^-]/C_T, and _{2 =} [A^2-]/C_T