6 Equilibrium - concept of chemical equilibrium constants their relationship Application of equilibrium Factors affecting equilibrium and le Chatelier's principle Solubility criteria Common ion effect Application of solubility equilibrium acid base equilibrium atomization of water

The equilibrium constant ($K_c$ for concentrations or $K_p$ for partial pressures) is a numerical value that expresses the ratio of product concentrations to reactant concentrations at equilibrium, each raised to the power of their stoichiometric coefficients. It indicates the extent to which a reaction proceeds towards products at a given temperature.