Q.

A basic buffer solution contains a weak base B and its conjugate acidBH+. On adding some HCl, which of the following reactions takes place to maintain constant pH ?

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a

BH+ + OH B+H2O

b

BH+ B+ H+

c

H+ + OH  H2O

d

B + H2OBH+ + OH 

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 HClions to form water molecule to maintain constant pH.

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