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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

Respuesta :

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

Chemical reaction (dissociation) of silver oxalate in water: 
Ag₂C₂O₄(s) → 2Ag⁺(aq) + C₂O₄²⁻(aq).
Ksp(Ag₂C₂O₄) = [Ag⁺]²·[C₂O₄²⁻].
[C₂O₄²⁻] = 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.

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