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 is transferred in each reaction type: electrons in redox, protons in acid-base, and ions joining into a solid in precipitation. (Guide: “Three questions that sort most reactions”)
- I can define oxidation and reduction in terms of electrons and in terms of oxidation numbers. (Guide: “Redox reactions”; Practice Q7)
- I can state that electrons move from the species oxidised to the species reduced, in equal numbers. (Guide: Worked example 1; Practice Q4, Q7)
- I can explain why combustion is a redox reaction, and name the products of complete combustion of a hydrocarbon. (Guide: Worked example 2; Practice Q4)
- I can state which salts are always soluble: those of sodium, potassium, ammonium and nitrate. (Guide: “Precipitation reactions”)
Skills
- I can assign oxidation numbers to atoms in elements, compounds and polyatomic ions. (Guide: oxidation-number table; Practice Q1)
- I can balance a complete combustion equation and show that electrons lost equal electrons gained. (Practice Q4)
- I can find which product is the precipitate when two ionic solutions are mixed, and write its net ionic equation. (Guide: Worked example 1(c); Practice Q3, Q6)
- I can calculate the mass of a precipitate from a volume and concentration. (Practice Q6(d))
Reasoning
- I can classify a reaction as acid-base, redox or precipitation and give evidence from the equation. (Guide: Figure 1; Practice Q2, Q5)
- I can explain why a reaction involving H⁺, or one that forms a solid, may still be redox. (Guide: Worked example 3; Practice Q7)
- I can use unchanged oxidation numbers to show that a reaction is not redox. (Practice Q2, Q6(c))
All ticked? Move on to Topic 4.8, Introduction to Acid-Base Reactions, or return to the course roadmap.