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Question

The addition of ammonium chloride to 0.1 M acetic acid will cause:


A

increase in its pH value

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B

decrease in its pH value

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C

no change in pH value

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D

change in pH which cannot be predicted

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Solution

The correct option is B

decrease in its pH value


Acid will furnish H+ ions.
NH4Cl(aq) + H2O (l) NH4OH (aq) + H+ (aq)

Salt of (Weak base + Strong acid) on hydrolysis will also furnish H+. Hence pH decreases


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