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Equivalent conductance of 1 M propanoic...

Equivalent conductance of 1 M propanoic acid is 10 `ohm^(-1)" cm^(2)eq^(-1)`. pH of the propanpoic acid solution is

A

7

B

`3.3`

C

`1.3`

D

`6.8`

Text Solution

Verified by Experts

The correct Answer is:
C
`alpha=(^^_(eq)^(c))/(^^_(eq)^(0))=(10)/(200)=0.05`
`[H^(+)]=C alpha =1xx0.05=0.05`
`pH=-log[H^(+)]=-log(5xx10^(-2))`
`=2 log 10 - log 5 =`2-0.6990=1.3`
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