Question

Determine the equilibrium constant expression for the following reactions: (2) MnO2(s) +4Ha) +2Ca Mn)+Cl2a)+ 2H,O i) (aq) PCIs) PCI) +Cle) ii) 5(s)

Answer 1

Kc is defined as concentration of product by concentration of reactant with each concentration term raised to power that is equal to its stoichiometric coefficient in balanced equation

pure liquid and solid do not appear in Kc

a)

pure liquid and solid do not appear in Kc

So, MnO2 and H2O will not be part of KC.

So,

Kc = [Mn2+][Cl2] / [H+]^4[Cl-]^2

b)

pure liquid and solid do not appear in Kc

So, PCl5 will not be part of KC.

So,

Kc = [PCl3][Cl2]