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pK(a) of a weak acid (HA) and p K(b) of ...

`pK_(a)` of a weak acid (HA) and `p K_(b)` of a weak base (BOH) are 3.2 and 3.4 respectively . The pH of their salt (AB) solution is -

A

`7.0`

B

`1.0`

C

`7.2`

D

`6.9`

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