(HT only) Predict that decreasing pressure favours the side of a gaseous equilibrium with more molecules of gas.

In The effect of pressure changes on equilibrium (HT only), this learning objective focuses on how to (HT only) Predict that decreasing pressure favours the side of a gaseous equilibrium with more molecules of gas. Within Reversible reactions and dynamic equilibrium, students should keep the idea anchored to The effect of pressure changes on equilibrium (HT only) rather than drifting into a different rate, equilibrium, catalyst, reversible reaction, or graph concept. Key terms to use include HT only, pressure. A strong AQA GCSE Chemistry answer names the exact factor or relationship, explains the particle or equilibrium reason where needed, and links the point back to the question wording with correct units or graph language when relevant.