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Q.

pKaof a weak acid (HA) and pKbof a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is:

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a

7.0

b

1.0

c

7.2

d

6.9

answer is D.

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Detailed Solution

pH=7+12(pKa−pKb)=7+12 (3.2−3.4)=6.9

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