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Basic Buffer Action

pH of HCN+K...

Question

$p H$ of $(H C N + K C N)$ buffer can be increased by _____.

A

adding

H C N

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B

adding

K C N

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C

adding limiting

K O H

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D

dilution

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Solution

The correct option is C adding limiting $K O H$
$(H C N + K C N)$ buffer
$C N^{-}$ is the common ion.
$H^{+}$ and $K^{+}$ and $C N^{-}$ ions.
By adding limoting $K O H$ , one can reduce the $p H$ of $(H C N + K C N)$ buffer.

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