Unit at a glance
6 lessons, 270 minutes of teaching
Scheme of work
The lessons in order
| Ref | Lesson pack | Structure | Worksheet | Quiz | Lab tab |
|---|---|---|---|---|---|
| 3.1 | Formulae and equations A formula tells you which atoms are in a substance and in what ratio. | Rally Robin | 6 Q, 16 marks | 8 MCQ | none |
| 3.2 | Relative masses Atoms are far too light to weigh one at a time, so chemists compare them with one standard atom, carbon-12. | Numbered Heads Together | 6 Q, 14 marks | 8 MCQ | tab 1 |
| 3.3 | The mole and gas volumes Nobody can count 10 23 atoms, but anyone can weigh them. | Round Table | 6 Q, 13 marks | 8 MCQ | tab 2, tab 5 |
| 3.3 | Reacting masses, yield and purity A balanced equation gives a ratio of moles, not of grams. | Rally Coach | 6 Q, 17 marks | 8 MCQ | tab 4, tab 7 |
| 3.3 | Concentration and titrations Concentration tells you how much solute is in each cubic decimetre of solution. | Numbered Heads Together | 6 Q, 16 marks | 8 MCQ | tab 6 |
| 3.3 | Empirical and molecular formulae Analysis tells you what a compound is made of, by mass. | Round Table | 6 Q, 15 marks | 8 MCQ | tab 3 |
Each pack holds the plan, worksheet and quiz for its lesson. Teach the rows in order; the lab tabs match the student lessons.
Also for this topic
Topic resources
Topic labStoichiometry lab
Question bank48 questions across the topic
Revision notesOne page per lesson
Notes PDFPrintable topic notes
Student syllabus pageStoichiometry
Practical trainerTitration trainer
Practical trainerQualitative analysis
Practical trainerRates and energetics
Practical trainerPaper 5 workout: temperature change of a reaction
Practical trainerPaper 5 workout: titration with two acids
Practical trainerPaper 5 workout: rate of reaction by gas collection