FREE Sample – Amount of Substance Workbook – OCR A Level Chemistry (AS)

Short summary
13 free pages from the Amount of Substance workbook, plus an OCR-style exam question with a full model answer.

Description
See how the Chemistry Unlocked workbooks teach mole calculations before you buy.

This free sample includes:
• The Maths toolkit: significant figures, standard form and unit conversions
• Skill 3: the mole and the Avogadro constant (Learn it, See it, Check it, Try it)
• Skill 6: finding x, the water of crystallisation, with the two-lane diagram
• Skill 8: pV = nRT, with the unit table and worked road map
• A page of the OCR-style mark scheme
• A free 8-mark exam question (thermal decomposition of NaHCO₃, gas volume with pV = nRT) with a step-by-step model answer and “where students lose marks” notes

The full workbook has 74 pages, 12 skills, 120 OCR-style practice questions, a 50-mark exam paper and full mark schemes: https://www.tes.com/teaching-resource/resource-13627199

Free to use with your own students. Not endorsed by OCR.
Keywords / tags
free, amount of substance, moles, OCR A chemistry, A level chemistry, Year 12, pV = nRT, water of crystallisation, exam question, model answer