What is the equilibrium constant expression for the following reaction? Now remember, with equilibrium expressions we exclude solids and liquids. If we take a look here, here's a solid. So we're going to exclude this exclude, exclude and exclude.
We're going to say our equilibrium expression K or equilibrium constant K equals products over reactants. So the products over reactants represents our equilibrium expression we're going to include here we have the concentration of hypochlorous acid HOCL and then here we have CL2 chlorine gas.
Remember their coefficients will be our exponents and since both of them have a coefficient of two, this will be hypochlorous acid squared over CL2 gas also squared. This here represents the equilibrium expression for the chemical reaction given within this example question.
K = [ HOCl ] 2 [ Cl 2 ] 2