IB Chemistry SL 2.1.1 Chemical equations Question Bank

Practise IB Chemistry SL 2.1.1 by applying chemical equations to exam-style questions.

Exam points

identify the relevant chemical structure, process or evidence
apply the correct chemical model or equation
evaluate the result using chemical reasoning and data

[Maximum number: 1]

Iron may be extracted from iron (II) sulfide, FeS.

The first step in the extraction of iron from iron (II) sulfide is to roast it in air to form iron (III) oxide and sulfur dioxide.

Write the equation for this reaction.

$4 \mathrm{FeS}(\mathrm{s})+7 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{Fe}_{2} \mathrm{O}_{3}(\mathrm{~s})+4 \mathrm{SO}_{2}(\mathrm{~g})$

Marking guidance:

Accept any correct ratio.

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2.1.1—Chemical equations question 1