A free, complete sample lesson for Unit 1 (Principles and Applications of Science I), chemistry section: the mole, molar mass, concentration and making a standard solution.

Learning objectives:

• Define the mole and use the Avogadro constant.
• Convert between mass, moles and molar mass.
• Calculate concentrations in mol dm⁻³ and g dm⁻³, converting cm³ to dm³.
• Describe how to make up a standard solution accurately

What’s included:

• Student worksheet (PDF and editable Word)
• Teacher version with model answers and mark schemes (PDF and editable Word)
• Teacher notes: lesson flow, common misconceptions and practical/safety notes
• Retrieval starter (5 marks)
• Structured tasks with key-idea boxes and clear diagrams
• Check for Understanding quiz (10 marks) with a confidence self-assessment
• Exam-style practice (15 marks), ending with a levels-marked 6-mark question with indicative content

Specification coverage:

• A1 · Quantities: the mole, the Avogadro constant and molar mass.
• A1 · Quantities: concentration of solutions (molarity) in mol dm⁻³ and g dm⁻³.

About 60 minutes of teaching; the exam-style section works in class or as homework. All questions are original.

Written for the Pearson BTEC Level 3 Nationals in Applied Science. Not endorsed by Pearson. Free to use under the Creative Commons NoDerivatives licence.

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