# How do you find the Keq equation?

Aug 18, 2016

Well, you need the chemical equation first.

#### Explanation:

Typically ${K}_{\text{eq}}$ $=$ $\text{Concentrations of reactants"/"Concentration of products}$. Each term is appropriately modified depending on its multiplicity in the defining chemical equation.

Say for dinitrogen fixation:

${N}_{2} \left(g\right) + 3 {H}_{2} \left(g\right) r i g h t \le f t h a r p \infty n s 2 N {H}_{3} \left(g\right)$

${K}_{\text{eq}}$ $=$ $\frac{{\left[N {H}_{3}\right]}^{2}}{\left[{N}_{2}\right] {\left[{H}_{2}\right]}^{3}}$