Equilibrium Constant Calculator

Find Kc from product and reactant concentrations.

Product concentration (mol/L)

Product coefficient

Reactant concentration (mol/L)

Reactant coefficient

Equilibrium constant Kc 2.5

Formula: Kc = [products]^p ÷ [reactants]^r

Step-by-step with your numbers:

1. Values used:

2. Product concentration = 0.5 mol/L

3. Product coefficient = 1

4. Reactant concentration = 0.2 mol/L

5. Reactant coefficient = 1

7. Product concentration x Product coefficient = 0.5 x 1 = 0.5

8. Equilibrium constant Kc = (Product concentration x Product coefficient) / Reactant concentration = 0.5 / 0.2 = 2.5

Did we solve your problem today?

Compute the equilibrium constant for a simple reaction at equilibrium.

The math behind it

Kc = [products] raised to their coefficients ÷ [reactants] raised to theirs.

[P] 0.5 (¹), [R] 0.2 (¹) → Kc = 2.5.

Kc > 1?

Products are favored at equilibrium.