AP Chemistry · Topic 7.13
pH and Solubility Practice
Part of Equilibrium.(SPQ-5.C)
Practice questions
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Sample questions
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Sample 1difficulty 4/5
Solubility of MS (where M is a metal cation) generally
- A
Decreases as pH lowers
- B
Unaffected by pH
- Ccheck_circle
Increases as pH lowers (S²⁻ + H⁺ → HS⁻)
- D
Same as for metal chlorides
Why
Acid removes S²⁻ as HS⁻/H₂S, shifting MS dissolution forward — more soluble in acid.
- A