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Sindh MDCAT 2020 Chemistry #Chemical Equilibrium #Common Ion Effect

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Purification of table salt (NaCl) by passing HCl gas through its saturated aqueous solution is an example of: (Sindh MDCAT 2020)

Verified Answer & Explanation⌄

Correct Answer: C) Common ion effect

Concept Explanation

Passing HCl adds Cl⁻ ions to the saturated NaCl solution. The common Cl⁻ ion decreases NaCl solubility, so NaCl crystallizes out.

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