Calculate the solubility of silver oxalate, ag2c2o4, in pure water. ksp = 1.0 * 10-11

a. 1.4 * 10-4 m

b. 8.2 * 10-5 m

c. 5.4 * 10-5 m

d. 3.2 * 10-6 m

e. 2.5 * 10-12 m

Answer is: the solubility of silver oxalate is a. 1.4 * 10-4 m.

Chemical reaction (dissociation) of silver oxalate in water:

Ag ₂C₂O₄ (s) → 2Ag⁺ (aq) + C₂O₄²⁻ (aq).

Ksp (Ag ₂C₂O₄) = [Ag⁺]²·[C₂O₄²⁻ ].

[C ₂O₄²⁻] = x; solubility of oxalate ion.

[Ag⁺] = 2[C₂O₄²⁻ ] = 2x

1.0·10 ⁻¹¹ = (2x) ² · x = 4x³.

x = ∛1.0·10⁻¹¹ : 4.

x = 1.4·10⁻⁴ M.