Difference Between Kc and Kp

What is Kc?

1. It is the equilibrium constant which is a ratio of the concentration of reactants at the equilibrium in a reversible reaction.
2. Mathematically,

What is Kp?

1. It is the equilibrium constant which is a ratio of partial pressure of products and partial pressure of reactants at the equilibrium in a reversible reaction.
2. Mathematically,