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6 February, 21:51

A solution is 0.025 m in pb2+. what minimum concentration of cl - is required to begin to precipitate pbcl2. the ksp for pbcl2 is 1.17 * 10-5.

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  1. 6 February, 22:13
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    Answer is: minimum concentration of chlorine anion is 0.0216 M.

    Balanced chemical reaction: Pb ²⁺ (aq) + 2Cl⁻ (aq) → PbCl₂ (s).

    [Pb²⁺] = 0.025 M.

    Ksp = 1.17·10⁻⁵.

    Ksp = [Pb²⁺] · [Cl⁻]².

    [Cl⁻] = √Ksp : [Pb²⁺].

    [Cl⁻] = √0.0000117 : 0.025.

    [Cl⁻] = 2.16·10⁻² M.
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