A basic buffer solution contains a weak base B and its conjugate acid $B H^{+}$ . On adding some $H C l$ , which of the following reactions takes place to maintain constant pH ?

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$B H^{+} + O H^{} \to B + H_{2} O$

$B H^{+} \to B + H^{+}$

$H^{+} + O H^{} \to H_{2} O$

$B + H_{2} O \to B H^{+} + O H^{}$

answer is C.

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Detailed Solution

The buffer solution is basic, it should have hydroxide ions which react with Hydrogen ions of added $H C l$ ions to form water molecule to maintain constant pH.

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