(a) State the law of chemical equilibrium.
(b) Write the expressions for equilibrium constants for the following pairs of reactions and establish the relation between them.
I. `H_(2)+I_(2)hArr2HI`
`HIhArr(1)/(2)H_(2)+(1)/(2)I_(2)`
II. `2NH_(3)hArrN_(2)+3H_(2)`
`(1)/(2)N_(2)+(3)/(2)H_(2)hArrNH_(3)`

Answer

(a) Refer volume
(b) (i) `K_(c)=(1)/(K'_(c)^(2))`
(ii) `K_(c)=(1)/(K'_(c)^(2))`

Explanation

(b) (i) `K_(c)=([HI]^(2))/([H_(2)][I_(2)])`
(ii) `K_(c)=([N_(2)][H_(2)]^(3))/([NH_(3)]^(2))`