Find the equilibrium constant, Keq, for the following equilibrium. The initial concentrations of AB and A2D are 0.30 M before they are mixed and when equilibrium is reached, the equilibrium concentration of A2D is 0.20 M. Use an ICE table for your calculation. ( Keq = 0.80) 2 AB (g) + C2D (s) ↔ A2D (g) + 2 CB (s)