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Equivalent conductane of 0.1 M HA (weak...

Equivalent conductane of 0.1 M HA (weak acid) solution is 10 S`cm^(2) "equivalent"^(-1)` and that at infinite dilution is 200 S `cm^(2) " equivalent"^(-1)` Hence pH of HA solution is

A

1.3

B

1.7

C

2.3

D

3.7

Text Solution

Verified by Experts

The correct Answer is:
C
`alpha=(^^_(C))/(^^_(eq))=(10)/(200)=(1)/(20)=0.05`
`[H^(+)]=c.alpha,=0.1xx0.05=5xx10^(-3)`
`thereforepH=2.3`
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