A-Level Chemistry OCR A H432

use of the terms mole fraction and partial pressure

See also 3.2.3 Chemical Equilibrium.

calculation of quantities present at equilibrium, given appropriate data

the techniques and procedures used to determine quantities present at equilibrium

Not for K_p.

expressions for K_c and K_p for homogeneous and heterogeneous equilibria (see also 3.2.3f)

Note: liquid and solid concentrations are constant and are omitted in heterogeneous K_c and K_p expressions.

calculations of K_c and K_p, or related quantities, including determination of units (see also 3.2.3f)

Learners will not be required to solve quadratic equations.

(i) the qualitative effect on equilibrium constants of changing temperature for exothermic and endothermic reactions

(ii) the constancy of equilibrium constants with changes in concentration, pressure or in the presence of a catalyst

explanation of how an equilibrium constant controls the position of equilibrium on changing concentration, pressure and temperature

application of the above principles in 5.1.2 for K_c, K_p to other equilibrium constants, where appropriate (see also 5.1.3c etc.).