pK a of a weak acid HA and pK b of a weak base BOH are 3.2 and 3.4 respectively. The pH of their salt AB…

pK a of a weak acid HA and pK b of a weak base BOH are 3.2 and 3.4 respectively. The pH of their salt AB solution at 25 o C is
  1. 6.9
  2. 7.0
  3. 1.0
  4. 7.2

Solution

Hydrolysis of  salt of weak acid and weak base

pH= 1 2 pK w + pK a − pK b

=1214+3.2-3.4

=6.9

Asked in: JEE Main 2017 (02 Apr)

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