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3.2 Use of amount of substance in relation to masses of pure substances

3.2 Use of amount of substance in relation to masses of pure substances

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Question 1

All alkalis show characteristic chemical properties due to the presence of a specific ion in aqueous solution.

a.

State the chemical formula of the ion responsible for the alkaline properties of these solutions.

[1]
b.

A chemist prepares a standard solution of sodium hydroxide (NaOH\text{NaOH}NaOH) with a concentration of 18.5 g/dm318.5\text{ g/dm}^318.5 g/dm3. Calculate the mass of NaOH\text{NaOH}NaOH present in 220 cm3220\text{ cm}^3220 cm3 of this solution.

[2]
Markscheme

3.2 Use of amount of substance in relation to masses of pure substances Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Use of amount of substance in relation to masses of pure substances

38 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles (HT only), 3.2.2 Amounts of substances in equations (HT only), 3.2.3 Using moles to balance equations (HT only), 3.2.4 Limiting reactants (HT only), and 3.2.5 Concentration of solutions. Each one has a worked solution and a mark scheme showing where the marks go.

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