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Ph of 3xx10^(-3)M solution of H(3)X will...

`Ph` of `3xx10^(-3)M` solution of `H_(3)X` will be Assuming `alpha_(1)=1,alpha_(2)=1//3,alpha_(3)=` negligible

A

`2.40`

B

`3.0`

C

`3.4771`

D

`4.0`

Text Solution

Verified by Experts

The correct Answer is:
1
`H_(3)X rarr H^(+)+H_(2)X^(-)`
`3xx10^(-3)" "3xx10^(-3)`
`{:(H_(2)X,hArr,H^(+),+,HX^(-)),(3xx10^(-3),,3xx10^(-3),,0),(3xx10^(-3)-Calpha_(2),,3xx10^(-3)+Calpha_(2),,):}`
`(H^(T))=3xx10^(-3)+3xx10^(-3)xx(1)/(3)`
`=4xx10^(-3)`
`pH=3-log4=-0.602~~2.4`
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