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Q.

The pKa of a weak acid, HA is 4.8. The pKb of a weak base, BOH is 4.78. The pH is an aqueous solution of the corresponding salt, BA, will be

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a

9.58

b

4.79

c

7.01

d

9.22

answer is B.

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Detailed Solution

pH = 7 + 12(pKa- pKb)

= 7 + 12 (4.8 – 4.78)

7 + 0.01 = 7.01

Hence, the correct option is option (B) 7.01.

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