To a buffer solution of $C H_{3} C O O H$ and $C H_{3} C O O N a$ , some $H C l$ is added. Then the reaction involved is

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$N a^{+} + O H^{-} \to N a O H$

$N a^{+} + O H^{-} \to N a O H N a^{+} + O H^{-} \to N a O H$

$C H_{3} C O O H + O H^{-} \to C H_{3} C O O^{-} + H_{2} O$

$C H_{3} C O O^{-} + H^{+} \to C H_{3} C O O H$

answer is B.

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Detailed Solution

In this solution

$C H_{3} C O O H ⇌ C H_{3} C O O^{-} + H^{+}$

$C H_{3} C O O N a \to C H_{3} C O O^{-} + N a^{+}$

Explanation: Upon addition of $H C l$ to the buffer solution the resulting $H^{+}$ ions will produce $C H_{3} C O O H$

Hence, the correct option is (2) $C H_{3} C O O^{-} + H^{+} \to C H_{3} C O O H$

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