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Question 70

In a blast furnace, iron is extracted from hematite (iron(III) oxide) by reduction with carbon monoxide. The balanced chemical equation for this reaction is:

\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2

Calculate the minimum mass of iron(III) oxide ( $Fe2O3\text{Fe}_2\text{O}_3$ ) needed to produce 16.8 g of iron ( $Fe\text{Fe}$ ).

(Relative formula masses ( $M_r$ ): $Fe=56\text{Fe} = 56$ , $Fe2O3=160\text{Fe}_2\text{O}_3 = 160$ )

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Markscheme

Calculations involving masses Questions

GCSE
Chemistry
Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.

Calculations involving masses

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Calculations involving masses

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Question 70

In a blast furnace, iron is extracted from hematite (iron(III) oxide) by reduction with carbon monoxide. The balanced chemical equation for this reaction is:

\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2

Calculate the minimum mass of iron(III) oxide ( $Fe2O3\text{Fe}_2\text{O}_3$ ) needed to produce 16.8 g of iron ( $Fe\text{Fe}$ ).

(Relative formula masses ( $M_r$ ): $Fe=56\text{Fe} = 56$ , $Fe2O3=160\text{Fe}_2\text{O}_3 = 160$ )

[2]

Markscheme

Calculations involving masses Questions

GCSE
Chemistry
Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.