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3.1 Introducing chemical reactions

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Question 33

A chemical plant makes sodium sulfate by reacting sodium hydroxide with sulfuric acid.

H2SO4+2NaOH→Na2SO4+2H2O\mathrm{H_2SO_4 + 2NaOH \rightarrow Na_2SO_4 + 2H_2O}H2​SO4​+2NaOH→Na2​SO4​+2H2​O

A batch uses 8.00 kg of sodium hydroxide and excess sulfuric acid.

Relative atomic masses (ArA_rAr​): H = 1.0, O = 16.0, Na = 23.0

Relative formula mass (MrM_rMr​): Na2SO4\mathrm{Na_2SO_4}Na2​SO4​ = 142.1

Calculate the mass, in kg, of sodium sulfate formed.

Give your answer to 3 significant figures.

Mass of sodium sulfate = .................... kg

[4]
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3.1 Introducing chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Introducing chemical reactions

134 exam-style questions on OCR GCSE Chemistry 3.1 Introducing chemical reactions, covering 3.1.1 Writing formulae and balanced chemical equations, 3.1.2 Formulae of compounds from ions, and state symbols, 3.1.3 Conservation of mass and observed changes in mass, 3.1.4 Half equations and balanced ionic equations, 3.1.5 The mole and the Avogadro constant, and 3.1.6 Stoichiometry, limiting reactants and reacting masses. Each one has a worked solution and a mark scheme showing where the marks go.

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