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Calculate the ratio of [HXOO^(-)] and [F...

Calculate the ratio of `[HXOO^(-)]` and `[F^(-)]` in a mixture of 0.2 M HCOOH `(K_(a)=2xx10^(-4))` and 0.1 M HF `(K_(a)=6.6xx10^(-4)) :`

A

`1:6.6`

B

`1:3.3`

C

`2:3.3`

D

`3.3:2`

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