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At certain temperature, dissociation con...

At certain temperature, dissociation constant of formic acid and acetic acid are `1.8xx10^(-4)` and `1.8xx10^(-5)` respectively. At what concentration of acetic solution, the `H_3O^(+)` ion concentration is same as that in 0.001 M formic acid solution

A

0.01 M

B

0.001 M

C

0.1 M

D

0.0001 M

Text Solution

Verified by Experts

The correct Answer is:
A
`[H^(+)]=sqrt(K_(a)C) implies K_(a1)C_(1)=K_(a2)C_(2)`
`1.8xx10^(-4)xx10^(-3)=1.8xx10^(-5)xxC_(2)implies C_(2)=10^(-2)`
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