Which calcium compound is not appreciably more soluble in 0.1 M hydrochloric acid than it is in pure water? | Aqueous Chemistry

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Question

Which calcium compound is not appreciably more soluble in 0.1 M hydrochloric acid than it is in pure water?

Limestone, CaCO₃

Slaked lime, Ca(OH)₂

Gypsum, CaSO₄ • 2 H₂O

✓ Correct

Hydroxyapatite, Ca₅(OH)(PO₄)₃

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