Work through the list without notes. If you cannot do a statement, follow its link, then come back. Guide = study guide; Practice = practice questions.
Understanding
- I can give examples of reversible physical processes (evaporation and condensation, gas absorption and desorption, dissolving and precipitating). (Guide: “Reversible processes are everywhere”; Practice Q2)
- I can name proton transfer (acid–base) and electron transfer (redox) as reversible chemical processes. (Guide: “Reversible processes are everywhere”; Practice Q7)
- I can list the three things you observe at equilibrium: no visible change, all species present, constant concentrations or partial pressures. (Guide: “What you see when a system reaches equilibrium”; Practice Q1)
- I can explain why equilibrium is dynamic: the forward and reverse processes continue at equal rates. (Guide: “Equilibrium is dynamic”; Practice Q1, Q2)
- I can explain why a closed system is needed for equilibrium. (Guide: Common misconceptions)
Skills
- I can find the time at which equilibrium is reached from a table or graph of concentration or partial pressure against time. (Guide: Worked example 1; Practice Q3)
- I can describe how the forward and reverse rates change from the start of a reaction until equilibrium, and sketch the rate–time graph. (Guide: Figure 2; Practice Q6)
- I can use the coefficients to check graph data or to find equilibrium partial pressures from a measured change. (Guide: Worked example 2; Practice Q4)
Reasoning
- I can refute the claim that equilibrium is where concentration lines cross or where amounts are equal. (Guide: Worked example 1(b); Practice Q3)
- I can use labelled-atom evidence to argue that an equilibrium is dynamic. (Guide: “Equilibrium is dynamic”; Practice Q5)
- I can use data to show that a reaction has not gone to completion and has not stopped. (Practice Q7)
All ticked? Move on to Topic 7.2, Direction of Reversible Reactions, or return to the course roadmap.