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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 23

All alkalis show similar chemical properties due to the presence of a specific ion.

a.

State the chemical formula of the ion present in all alkalis.

[1]
b.

A student prepares a solution of potassium hydroxide (KOH\text{KOH}KOH) with a concentration of 28 g/dm3. Calculate the mass of KOH\text{KOH}KOH that would be present in 150 cm3 of this solution.

[3]
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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