Which of the following salts is insoluble in acetic acid?

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${CaC}_{2} O_{4}$

${CaCO}_{3}$

$Ca (OH)_{2}$

$CaO$

answer is C.

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Detailed Solution

Calcium oxalate is insoluble in acetic acid, whereas calcium oxide, calcium carbonate and calcium hydroxide are soluble in acetic acid. There are two reasons that why calcium oxalate is not soluble in acetic acid:

The insolubility of calcium oxalate in acetic acid is due to its high lattice energy and low solvation energy.
Oxalic acids are stronger than acetic acid, therefore salts of oxalic acids are not dissolved in acetic acid.

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