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Calculate pH of the buffer solution cont...

Calculate pH of the buffer solution containing `0.15` mole of `NH_(4)OH " and " 0.25 ` mole of `NH_(4)Cl. K_(b) " for " NH_(4)OH " is " 1.98 xx 10^(-5)`.

A

10

B

9

C

`9.2`

D

`10.2`

Text Solution

Verified by Experts

The correct Answer is:
A
`14 - pH = pK_(b) + log. (["Salt"])/(["Base"])`
` - log (1.98 xx10^(-5))+ log. ((0.25)/(0.15))`
`pH = 9 `
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