Equilibrium Constant

The equilibrium law is based on the law of mass action which states that the rate at which a reaction proceeds is directly proportional to the concentration of the active species in the system. 

Equilibrium constant is a measure of the ratio of the equilibrium concentration of the products of a reaction to the equilibrium of the reactants, with each concentration raised to the power corresponding to the coefficient in the balanced equation of the reaction. It is represented with the letter “K”. In the general reaction.