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K(a) for acid HA and HB are 2.1 xx 10^(...

`K_(a)` for acid HA and HB are `2.1 xx 10^(-4)` and `1.1 xx 10^(-5)` respectively. The relative strength of acid if concentration is same:-

A

`19:1`

B

`2.3:1`

C

`1:2.1`

D

`4.37 :1`

Text Solution

Verified by Experts

The correct Answer is:
D
Relative strength of acid `= sqrt((Ka_(1))/(Ka_(2))) = sqrt((2.1 xx 10^(-4))/(1.1 xx 10^(-5)))`
`= 4.37 : 1`
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