A mixture of weak acid is 0.1M in HCOOH ...

A mixture of weak acid is `0.1M` in `HCOOH (K_(a) = 1.8 xx 10^(-4))` and `0.1M` in `HOCN (K_(a) = 3.1 xx 10^(-4))`. Hence, `[H_(3)O^(o+)]` is

A

`7.0 xx 10^(-3) M`

B

`4.1 xx 10^(-4) M`

C

0.20M

D

`4.1 xx 10^(-3) M`

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The correct Answer is:

A

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