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6 February, 21:12

Write the ksp expression for the sparingly soluble compound silver chromate, ag2cro4.

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  1. 6 February, 23:56
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    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.
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