When ammonium chloride is added to ammonia so | vedclass

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(C) Ammonia solution contains $NH_4OH$ which is a weak base and ionizes as $NH_4OH \rightleftharpoons NH_4^{+} + OH^{-}$.When $NH_4Cl$ is added,it pro

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decreased

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(C) Ammonia solution contains $NH_4OH$ which is a weak base and ionizes as $NH_4OH \rightleftharpoons NH_4^{+} + OH^{-}$.When $NH_4Cl$ is added,it provides $NH_4^{+}$ ions,which is a common ion.Due to the common ion effect,the equilibrium shifts to the left,decreasing the concentration of $OH^{-}$ ions.Since $pH = 14 - pOH$ and $pOH = -\log[OH^{-}]$,a decrease in $[OH^{-}]$ leads to an increase in $pOH$,which consequently results in a decrease in the $pH$ value.

When ammonium chloride is added to ammonia solution,the $pH$ of the resulting solution will be

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