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.

Question

Collin Noble

Chemistry

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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Nico Gallegos · Answer 1

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.