Chemical reaction (dissociation) of silver chromate in water:
Ag₂CrO₄(s) → 2Ag⁺(aq) + CrO₄²⁻(aq).
Ksp(Ag₂CrO₄) = [Ag⁺]²·[CrO₄²⁻].
[CrO₄²⁻] =
x.
[Ag⁺] =
2[CrO₄²⁻] = 2x
Ksp = (2x)² · x = 4x³.
Ksp is the solubility product constant for a solid substance dissolving in an aqueous solution.
[Ag⁺] is equilibrium concentration of silver cations.
[CrO₄²⁻] is equilibrium concentration of chromate anions.
