At any given temperature, the ration of products to reactants is always constant.
The expression does not include any substances that are pure liquids or pure solids, as the concentration of these substances do not change. They are rendered as ‘1’ in calculations.
An equilibrium constant has the following characteristics:
- It is constant, for a particular reaction at a specific temperature
- If the temperature is changed, so does the value of K
- It indicates the relative proportions of the reactants and products in a mixture
- If K has a large value, then it contains large amounts of product and little amounts of reactant
- If K is a small value, then there are less products than reactants
- It does not indicate the rate of reaction