Question

The equilibrium constant, Kc is 3.2 x10 -34 at 25C for the reaction 2 HCl(g) <=> H2(g) + Cl2(g). what is The equilibrium expression, Kc for the reaction

Answer 1

Kc = (H2)(Cl2)/(HCl)^2
These are easy to write. Just remember this.
Put products on top, reactants on bottom, then make the exponent of each reactant and product the same as the coefficient in the balanced equation.

Answer 2

6.71 X 10^-18