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 explain what a box in a particle diagram represents and why counts are proportional to concentration. (Guide: “What a particle diagram shows”)
- I can tell from a sequence of snapshots when equilibrium has been reached. (Guide: Figure 1; Practice Q6(b))
- I can explain why particles move between equilibrium snapshots even though the counts stay the same. (Guide: “Before and at equilibrium”; Practice Q1)
- I can link a box that is mostly products, mostly reactants or a mixture to a large, small or moderate K. (Guide: “Linking the picture to the size of K”; Practice Q3)
- I can connect the particle view (reactions continuing) with the lab view (constant colour and pressure). (Guide: “Particle level and lab level”)
Calculation
- I can calculate K directly from counts when both sides of the equation have the same number of particles. (Practice Q2)
- I can convert counts to concentrations and calculate Kc when the particle numbers differ on each side. (Guide: Worked example 1; Practice Q6(c))
- I can calculate Q from a box and predict how the box will change. (Guide: Worked examples 2 and 3; Practice Q4)
- I can use an ICE table in particle counts to find the equilibrium box. (Guide: Worked example 2; Practice Q5)
Reasoning and drawing
- I can draw an equilibrium box with a key, the right counts and conserved atoms. (Guide: “Drawing your own particle diagram”; Practice Q5(c))
- I can check a sequence of boxes for atom conservation. (Guide: Figure 1; Practice Q6(a))
- I can find and explain errors in someone else’s particle diagram. (Practice Q3, Q7)
All ticked? Move on to Topic 7.9, Introduction to Le Châtelier’s Principle, or return to the course roadmap.