To pH value of decinormal solution of NH...

To pH value of decinormal solution of `NH_(4)OH` which is 20% ionised is

A

`13.30`

B

`14.70`

C

`12.30`

D

`12.95`

Verified by Experts

The correct Answer is:

C

For `NH_(4)OH`
`[OH^(-)] = C.alpha , C = 1/10 M , alpha 0.2 `
`[OH^(-)] = 1/10 xx 0.2 = 2 xx 10^(-2) M ` `pH = 14 - pOH = 14 - 1.7 = 12.30 `

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