4.6.2.5

4.6.2.5 The effect of changing concentration (HT only)

Content

  • If the concentration of one of the reactants or products is changed, the system is no longer at equilibrium and the concentrations of all the substances will change until equilibrium is reached again.

If the concentration of a reactant is increased, more products will be formed until equilibrium is reached again.

If the concentration of a product is decreased, more reactants will react until equilibrium is reached again.

Students should be able to interpret appropriate given data to predict the effect of a change in concentration of a reactant or product on given reactions at equilibrium.


Content

Content

Key opportunities for skills development

Mixtures can be separated by physical processes such as

filtration, crystallisation, simple distillation, fractional distillation and chromatography. These physical processes do not involve chemical reactions and no new substances are made.

Students should be able to:

  • describe, explain and give examples of the specified processes of separation
  • suggest suitable separation and purification techniques for mixtures when given appropriate information.