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2.6 Calculations involving masses

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Question 4
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Iron reacts with chlorine gas to form iron chloride, FeCl3\mathrm{FeCl_{3}}FeCl3​.

Relative atomic masses: Cl = 35.5, Fe = 56

In an experiment, 1.12 g of iron reacts completely with chlorine to form 3.25 g of iron chloride.

a.

Calculate the mass of chlorine that reacted.

[1]
b.

Use the masses to deduce the balanced equation for the reaction. You must show your working.

[4]
c.i.

In a second experiment, 5.60 g of iron is heated with 7.10 g of chlorine.

Determine the limiting reactant and calculate the maximum mass of iron chloride that can form. Give your answer to three significant figures.

[4]
c.ii.

Calculate the mass of the reactant that is left over at the end of the reaction.

[2]
Markscheme

2.6 Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /2.6 Calculations involving masses

55 exam-style questions on Edexcel GCSE Chemistry 2.6 Calculations involving masses, covering 2.6.1 Relative formula mass and percentage composition, 2.6.2 Empirical and molecular formulae, 2.6.3 Conservation of mass, 2.6.4 Reacting masses and concentration in g dm⁻³, 2.6.5 The mole and the Avogadro constant, and 2.6.6 Limiting reactants and stoichiometry. Each one has a worked solution and a mark scheme showing where the marks go.

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