Equilibrium - A level chemistry - writing an expression for Kc - 2016 specification onwards

This is a thoroughly planned A level lesson writing an expression for the equilibrium constant Kc. The 2016 specification DOES NOT include Kp - partial pressures and thus students must ALWAYS write their expressions using SQUARE brackets (Kp uses curved brackets). The lesson starts with a recap of equilibrium then moves on to heterogeneous and homogeneous reaction systems. The lesson then moves to students writing expressions for Kc for a variety of reactions. Note that solids are left out of the expression for Kc as their concentration hardly changes during at equilibrium (they occupy a small volume). Answers are provided. Please rate this resource and leave feedback.