In equilibrium chapter : when we use formula of Kp and when we use Kc?
hello aditya
according to your question: If the equilibrium involves gaseous species, then the concentrations may be expressed in terms of partial pressures of the gaseous substance. The equilibrium constant will be Kp. while The equilibrium constant for the reaction expressed in terms of the concentration, it will be Kc.
hope this will help you. :)