Question

A reversible chemical reaction having two reactants in equilibrium. If the concentration of the reactants are doubled, then the equilibrium constant will:

• A. Also be doubled
• B. Be halved
• C. Become one-fourth
• D. Remain the same

Answer 1

The correct option is D Remain the same

When the concentrations of the reactants are changed, the concentrations of the products also change in such a way that the overall value of the equilibrium constant ($K_c$) remains the same. Thus the equilibrium constant is the characteristic of a given reaction and is unaffected by the changes in the concentrations of the reactants and products.