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Question

Addition of NH4Cl does not effect the pH of solution of NH4OH.

A
True
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B
False
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C
Ambigous
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D
None
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Solution

The correct option is B False
Adding a common ion prevents the weak acid or weak base from ionizing as much as it would without the added common ion. The common ion effect suppresses the ionization of a weak acid by adding more of an ion that is a product of this equilibrium.

So addition of NH4Cl reduces dissociation of NH4OH and because of that its pH will decreases.

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