12. The equilibrium constant for the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g) is Kc = 1.7 × 106. What is the equilibrium constant for the reaction: SO3(g) ⇌ ½ O2(g) + SO2(g).

Answer 1

The Keq for the reverse reaction is the reciprocal of the forward rx and since it is 1/2 the coefficients it would be the square root. So the new Keq would be the square root of the reciprocal.

sqrt 1/1.6x10⁶ = Keq