7.32 Predict which of the following reaction will have an appreciable concentration of reactants and products:

a) Cl2 (g) 2Cl (g) Kc = 5 ×10–39

b) Cl2 (g) + 2NO (g) 2NOCl (g) Kc = 3.7 × 108

c) Cl2 (g) + 2NO2 (g) 2NO2Cl (g) Kc = 1.8

If the value of Kc lies between 10-3 and 103, a reaction has an appreciable concentration of reactants and products. Thus, the reaction given in (c) will have an appreciable concentration of reactants and products.