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The dissociation constant of a weak acid...

The dissociation constant of a weak acid HA is `4.9 xx 10^(-8)`. Calculate for a decimolar solution of acid:.
`% ` of ionisation

A

3.5

B

4.2

C

5.3

D

2.5

Text Solution

Verified by Experts

The correct Answer is:
B
`p^(H)=(1)/(2)(p^(ka)-logc)`
`=(1)/(2)(7.3-log0.1)=(1)/(2)(8.3),4.15,~-4.2`
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