Calculate `[H^+],[HCOO^(-)] and [OCN^(-)]` in a solution that contains 0.1 M HCOOH `(K_a=2.4xx10^(-4)) and 0.1 M HOCN (K_a=4xx10^(-4))`.

Explanation

`[H^(+)]=sqrt((0.1xx2.4xx10^(-4))+(0.1xx4xx10^(-4)))=8xx10^(-3)M`
for `HCOOH" ",K_(a)=2.4xx10^(-4)=([H^(+)][HCOO^(-)])/([HCOOH])`
`:.[HCOOH^(-)]=3xx10^(-3)M`
For `HOCN" "K_(a)=4xx10^(-4)=([H^(+)][OCN^(-)])/([HOCN])`
`:.[OCN^(-)]=5xx10^(-3)M`