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29 July, 13:14

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

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  1. 29 July, 13:33
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    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.
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