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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 = (Lambda_(eq)^(c ))/(Lambda_(eq)^(@)) = 10/200 = 0.05`
`pH =-log [H^(+)] = -log (5 xx 10^(-2))`
`=2 log 10 - log 5 = 2-0.6990 =1.3`
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