What concentration of `CO_(2)` be in equilibrium with `0.025 M` CO at `120^(@)C` for the reaction
`FeO(s)+CO(g) hArr Fe(s)+CO_(2)(g)`
if the value of `K_(c)=5.0` ?

Options

A. `0.125 M`
B. `0.0125 M`
C. `1.25 M`
D. `12.5 M`

Answer

A

Explanation

`{:(,FeO(s),+,CO(g),hArr,Fe(s),+,CO_(2)(g)),("At eq.",-,,0.025,,-,,x),(,"solid",,,,"solid",,):}`
`K_(c)=[(CO_(2)(g))/(CO(g))]=x/0.025=5.0` (Given)
`:. x=0.125 M`
`[CO_(2)]=0.125 M`