Equilibrium ICE table
Calculate concentrations at equilibrium from a balanced reaction and Kc.
About this tool
Choose an example or enter each species, its stoichiometric coefficient and initial concentration in mol/L. Set Kc, then Calculate. Add or remove species as needed; each side supports up to eight. Scientific notation such as 1e-20 is accepted. Reset restores the ammonia example and clears the result; reload restores inputs without recalculating.
Reading the table
Initial, Change and Equilibrium are concentrations. Changes are −νx for reactants and +νx for products; negative x means a reverse shift. The optional calculation check shows Qc initially and at equilibrium.
Model
For one balanced reaction at fixed volume and temperature, the solver finds Qc=Kc using concentration powers from the coefficients. Enter the conventional concentration-based Kc appropriate to mol/L; this is not a pressure or activity model. Solids, pure liquids and solvent water are omitted from the expression, not entered as concentration-bearing species. Formula names are labels: the tool does not balance the equation or check atoms/charges. Coupled reactions, changing volume, activity coefficients and water autoionization are not included; for dilute acid/base systems use the pH tool. Logarithmic endpoint distances retain small residual concentrations near complete conversion. Unrepresentable solutions produce an error rather than a misleading table.