This exam focus covers Exam Focus: Equilibrium within Equilibrium (HT) for GCSE Chemistry. Revise Equilibrium (HT) in Rates of Reaction for GCSE Chemistry with 23 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 11 of 14 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
🎯 Exam Focus: Equilibrium
very-high Le Chatelier questions (3-4 marks HT): State the direction of shift, explain why using the principle, and state the effect on yield.
high Haber process analysis (3-4 marks): Explain the compromise conditions — why 450°C rather than lower temperature, why 200 atm rather than higher.
medium Dynamic equilibrium definition (2 marks): Must include "rates are equal" AND "closed system" AND "both reactions still occurring".
Key phrase to earn marks: "The equilibrium position shifts to the [left/right], increasing/decreasing the yield of [product/reactant]."
Edexcel 1CH0: Examined in Paper 2 (1CH0/2). Le Chatelier's principle is Higher tier in Edexcel 1CH0 — expect questions on effect of temperature, pressure, and concentration on equilibrium position. In Edexcel-style questions, the command word "Suggest" appears frequently — use your chemistry knowledge to apply to an unfamiliar context.
Practice questions for Equilibrium (HT)
At dynamic equilibrium, which of the following is true?
Explain the effect of increasing temperature on the position of an equilibrium where the forward reaction is exothermic.