Edexcel IGCSE Chemistry 1.25 Chemical equations

Practise completing balanced chemical equations for familiar and unfamiliar reactions, including correct formulae, coefficients and state symbols.

Exam points

complete product formulae and balance equations
add state symbols for solids, liquids, gases and aqueous solutions in reaction equations
use the information given to write equations for unfamiliar reactions

[Maximum number: 2]

This question is about magnesium metal and its compounds.

Magnesium burns in oxygen gas to form solid magnesium oxide.

Complete the chemical equation for the reaction by balancing the equation and adding the state symbols.

Figure for Question 1.25 Chemical equations question 1 — Edexcel IGCSE Chemistry

$\ce{2Mg(s) + O2(g) -> 2MgO(s)}$

Marking guidance:
- 1 mark for balancing.
- 1 mark for state symbols.
- Allow multiples or fractions, but $\ce{O2}$ must also be changed to score the balancing mark.

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1.25 Chemical equations question 1