Sodium chloride is added slowly to a solution that is 0.010 M in Cu , Ag , and Au . The Ksp values for the chloride salts are 1.9 x 10-7, 1.6 x 10-10, and 2.0 x 10-13, respectively. Which compound will precipitate first

AuCl

Explanation:

The solubility product constant, ksp, is defined as:

MₓYₙ(s) ⇄ xMⁿ⁺(aq) + nYˣ⁻(aq)

ksp = [Mⁿ⁺]ˣ + [Yˣ⁻]ⁿ

Thus, the higher ksp, the more soluble the compound is. Thus, the lower ksp the less soluble the compound is precipitating first. As the lower ksp is for Au, the first compound in precipitate is AuCl

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