pH and Solubility

AP Chemistry· difficulty 4/5

Solubility of MS (where M is a metal cation) generally

A
$Decreases as pH lowers$
B
$Unaffected by pH$
C
$Increases as pH lowers (S²⁻ + H⁺ \to HS⁻)$
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D
$Same as for metal chlorides$

Explanation

Acid removes S²⁻ as HS⁻/H₂S, shifting MS dissolution forward — more soluble in acid.

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