Calculadora de Constante de Equilíbrio

The Equilibrium Constant Calculator determines the value of Kc for a reversible chemical reaction at equilibrium. The equilibrium constant is calculated from the molar concentrations of products and reactants, each raised to its stoichiometric coefficient. The formula used is Kc = ([C]^c * [D]^d) / ([A]^a * [B]^b), where [A], [B] are the concentrations of reactants, [C], [D] are the concentrations of products, and a, b, c, d are the coefficients from the balanced equation.

To use the calculator, you need to enter the molar concentrations (in mol/L) of each substance and their stoichiometric coefficients. The tool then automatically performs the calculation, providing the Kc value. It is important that the reaction is balanced and the concentrations are those at equilibrium, not initial ones. The result indicates whether the reaction favors products (Kc > 1) or reactants (Kc < 1).

This calculator is useful for chemistry students, chemical engineers, and professionals analyzing equilibrium systems. Common cases include studying reactions in aqueous solutions, industrial processes like ammonia synthesis, and acid-base equilibria. Remember that the equilibrium constant depends on temperature; for different temperatures, the Kc value may change.

Important precautions: ensure the reaction is balanced and coefficients are correct. Concentrations must be in mol/L and represent the equilibrium state. For reactions involving pure solids or liquids, their activities are considered 1, so they do not appear in the Kc expression. Also, the calculator assumes ideal behavior; in concentrated solutions, activity may differ from molar concentration.