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The pK(a) of a weak acid, HA, is 4.80. T...

The `pK_(a)` of a weak acid, `HA`, is `4.80`. The `pK_(b)` of a weak base, `BOH`, is `4.78`. The `pH` of an aqueous solution of the corresponding salt, `BA`, will be:

A

`8.58`

B

`4.79`

C

`7.01`

D

`9.22`

Text Solution

Verified by Experts

The correct Answer is:
C
It is a salt of weak acid and weak base.
`pH=7+(1)/(2)(pK_(a)-pK_(b))`
`=7+(1)/(2)(4.8-4.78)=7.01`
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