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  4. Dissolving NaCN in de-ionized water will result in a solution having

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Q. Dissolving $NaCN$ in de-ionized water will result in a solution having

WBJEEWBJEE 2017Equilibrium

Solution:

$\because$ On dissolving NaCN in de-ionised water, following reaction takes place.
$CN ^{-}+ H _{2} O \rightleftharpoons HCN + OH ^{-}$
$\because CN ^{-}$ions come from the salt of strong base and weak acid.
$\therefore $ The solution becomes basic and $pH >7$.