BRAINCAKEEquilibrium
Revision notes for Equilibrium in OCR Chemistry A (H032). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.
- Dynamic EquilibriumSome reactions are reversible.
- Le Chatelier's PrincipleThe position of equilibrium indicates the extent of a chemical reaction.
- Effect of Changing the Concentration on the Position of EquilibriumIf the concentration of the reactants is increased the equilibrium will shift to the right.
- Effects of Temperature on the Position of EquilibriumThe direction in which the equilibrium shifts depends on the sign of ΔH and whether or not the reaction is endothermic or exothermic.
- Effects of Pressure on the position of EquilibriumPressure only affects equilibria that involve gases.
- Effects of Catalysts on the Position of EquilibriumA catalyst has no effect on the position of equilibrium.
- The Haber ProcessThe Haber process is used in the manufacture of ammonia from nitrogen gas and hydrogen gas.
- The Equilibrium LawThe equilibrium constant Kc is a measure of the relative concentrations of products and reactants in the equilibrium system.
- Calculating the Equilibrium ConstantTo calculate the equilibrium constant, the concentrations of the reactants and products at equilibrium must be known.
- Significance of the Equilibrium ConstantA Kc values of 1 indicates a position of equilibrium halfway between reactants and products.