Question

what is predicting direction of a reaction

Answer 1

Answer:

Equilibrium constants can be used to predict whether a reaction will favor the products or the reactants. K is the equilibrium ratio of products to reactants. The value for K is large (greater than one) when the products dominate the mixture and small (less than one) when the reactants dominate the mixture:

K > 1: products are favored

K = 1: neither reactants nor products are favored

K < 1: reactants are favored

If the reaction favors the products, it will occur in the forward (left-to-right) direction. If K is very large, the reaction will occur mostly to completion, using up almost all the reactants. If the reaction favors the reactants, it will occur in the reverse (right-to-left) direction. If K is very small, the reaction will use up almost all the products and make them into reactants.