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 say what a particle diagram of a solution must show: the relative numbers of particles and the interactions between them. (Guide: “What a particle diagram of a solution must show”)
- I can explain why water points its oxygen towards cations and a hydrogen towards anions. (Guide: Figure 1; Practice Q2)
- I can explain why polyatomic ions and molecular solutes stay whole when they dissolve. (Practice Q5(b), Q6)
Skills (drawing and reading diagrams)
- I can draw an ionic solution with separate ions in the formula ratio and balanced charges. (Guide: “Drawing ionic solutes”; Practice Q1)
- I can draw water molecules with the correct orientation around both a cation and an anion. (Guide: Figure 1; Practice Q6(b))
- I can draw a molecular solute such as methanol with hydrogen bonds to water placed correctly. (Guide: “Drawing molecular solutes”; Practice Q5(a))
- I can compare the concentrations shown by two diagrams that represent different volumes. (Guide: Worked example 3; Practice Q3)
- I can calculate ion concentrations from a diagram when I know how many moles each drawn particle represents. (Guide: Worked example 1; Practice Q4(b))
- I can show a dilution or a mixing step in a diagram by keeping or adding up particle counts and changing the volume. (Guide: Figure 2; Practice Q4(c), Q7)
Reasoning
- I can find and explain the errors in someone else’s diagram of a solution. (Guide: Worked example 2; Practice Q6)
- I can contrast the interactions in an ionic solution with those in a molecular solution. (Practice Q5(c))
- I know that colligative properties and molality or percent-by-mass calculations are not assessed in this course. (Guide: “Common misconceptions”)
All ticked? Move on to Topic 3.9, Separation of Solutions and Mixtures, or return to the course roadmap.