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The ionisation constant for acetic acid ...

The ionisation constant for acetic acid is `1.8xx10^(-5)`. At what concentration will it be dissociated to 2% ?

A

1 M

B

0.018 M

C

0.18 M

D

0.045 M

Text Solution

Verified by Experts

The correct Answer is:
D
`c=(K_(a))/(alpha^(2))=(1.8xx10^(-5))/((2xx10^(-2))^(2))`
`=4.5xx10^(-2)=0.045 M`
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