Chemistry, asked by anupamdwivedi1971, 10 months ago

If pk, for CN- at 25°C is 4.7. The pH of 0.5M
aqueous NaCN solution is :-
(1) 12 (2) 10 (3) 11.5 (4) 11

Answers

Answered by itzIntrovert

8

$\huge\bigstar\underline\orange{Answer}$

★ Reaction proceeds as

CN- + H2O → HCN +OH-

$\boxed{refer\:to\: attachment}$

we get P0H = 2.5

so, Ph = (14-2.5) = 11.5✔️✔️

Happy to help (:

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