Master Topic C5 of OCR Gateway Science A GCSE Chemistry (J248): the concentration of solutions in g/dm³ and mol/dm³, titrations and titration calculations, percentage yield, atom economy, gas volumes and amounts of substance, rates of reaction and collision theory, measuring and calculating rates, catalysts, and reversible reactions, dynamic equilibrium and Le Chatelier’s principle. Worked calculations, required-practical method steps, exam tips and graded model answers for Foundation and Higher tiers.
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