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Question

Addition of sodium acetate solution to acetic acid causes the following change-

A
pH increases
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B
pH decreases
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C
pH remains unchanged
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D
pH becomes 7
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Solution

The correct option is B pH increases
Dissociation of CH3COOH is suppressed by the addition of sodium acetate (CH3COONa) due to common ion (CH3COO) effect. The [H+] decreases raising the pH of the acid solution.

Hence, pH will increases.

Therefore, option A is correct.

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