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3.1 Introducing chemical reactions

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Question 23
H

A student adds 3.27 g of zinc to dilute hydrochloric acid containing 0.080 mol of HCl.

Zn+2HCl→ZnCl2+H2 \mathrm{Zn + 2HCl \rightarrow ZnCl_{2} + H_{2}} Zn+2HCl→ZnCl2​+H2​

Which option identifies the limiting reactant and the maximum mass of zinc chloride made?

Relative atomic mass (ArA_rAr​): Cl = 35.5 Zn = 65.4

[1]
A

Zinc is limiting; 5.46 g

B

Zinc is limiting; 6.82 g

C

Hydrochloric acid is limiting; 10.9 g

D

Hydrochloric acid is limiting; 5.46 g

Markscheme

3.1 Introducing chemical reactions Questions

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

55 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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