Analytical ChemistryHard

Question

When NH₄Cl is added to a solution of NH₄OH :

Options

A.the dissociation of NH₄OH increases.

B.the concentration of OH^- increases.

C.the concentrations of both OH^- an NH₄⁺ increase.

D.the concentration of OH^- ion decreases.

Solution

NH₄Cl ⇋ NH₄⁺ + Cl^- ; NH₄OH ⇋ NH₄⁺ + OH^-.
Because of common ion effect, the ionisation of NH₄OH is suppressed.

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