Equilibrium Constant Calculator

Formula

The formula to calculate the equilibrium constant is:

\[ K = \frac{[C]^c [D]^d}{[B]^b [A]^a} \]

Where:

\(K\) is the equilibrium constant
\([A], [B], [C], [D]\) are the molar concentrations of those substances
\(a, b, c, d\) are the coefficients of each substance

What is an Equilibrium Constant?

An equilibrium constant is a constant used to describe when a solution will be at equilibrium. It is a measure of the relative concentrations of reactants and products in a chemical reaction at equilibrium.

Example Calculation

Example:

Coefficient of A (a) = 1
Coefficient of B (b) = 1
Coefficient of C (c) = 1
Coefficient of D (d) = 1
Concentration of A [A] = 0.5 M
Concentration of B [B] = 0.5 M
Concentration of C [C] = 1.0 M
Concentration of D [D] = 1.0 M

Using the formula:

\[ K = \frac{[1.0]^1 [1.0]^1}{[0.5]^1 [0.5]^1} = 4 \]

The equilibrium constant (K) is 4.