Reaction Quotient Calculator

Calculate the reaction quotient Q from species concentrations and coefficients and predict the direction of a reaction against K

Frequently Asked Questions

What is the difference between Q and K?

The reaction quotient Q uses the current concentrations at any moment, while the equilibrium constant K uses the concentrations at equilibrium. Comparing them shows which way the reaction will move.

What does it mean when Q is less than K?

When Q is smaller than K there are relatively too few products, so the reaction proceeds forward to make more products until Q rises to equal K.

Do I include solids and liquids?

No. Pure solids and pure liquids are left out of the reaction quotient expression because their activities are taken as one.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.