EQUILIBRIUM CONSTANT (noun)

 

Abbreviated as "K." The number obtained from the equilibrium expression of a reaction in equilibrium. If K>1, then the equilibrium concentrations of the products are greater than the equilibrium concentrations of the reactants, and the forward reaction is said to be favoured. If K<1, then the equilibrium concentrations of the reactants are greater than the equilibrium concentrations of the products, and the reverse reaction is said to be favoured. If K=1, then neither direction of the reaction is favoured over the other one.