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2.1 Purity and separating mixtures

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Question 6

Aluminium burns in oxygen to form aluminium oxide.

4Al+3O2→2Al2O34\mathrm{Al} + 3\mathrm{O_{2}} \rightarrow 2\mathrm{Al_{2}O_{3}}4Al+3O2​→2Al2​O3​

Relative atomic masses, ArA_rAr​: Al = 27.0, O = 16.0

Show that the total relative mass of the reactants is equal to the total relative mass of the product in this equation.

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2.1 Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Purity and separating mixtures

102 exam-style questions on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one has a worked solution and a mark scheme showing where the marks go.

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