Calculate pH of a resultant solution of ...

Calculate pH of a resultant solution of 0.1 M HA `(K_(a)=10^(-6))` and 0.5 M HB `(K_(a)=2xx10^(-6))` at `25^(@)C.`

A

6.5

B

9.5

C

3

D

7

Verified by Experts

The correct Answer is:

B

`pH=7+(1)/(2)pKa+(1)/(2)logC`
` = 7+3-(1)/(2)=9.5`

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