4.3.1 Write down the balanced equation for the reaction: $ \text{Na} + \text{Cl}_2 \rightarrow \text{NaCl} $

Grade 9 · CAPS

Grade 9 Chemical Equations

Natural Sciences and Technology practice questions with answers

Grade 9 Chemical Equations is part of the CAPS Natural Sciences and Technology curriculum, covering how to write and balance chemical equations so that the number of atoms of each element matches on both sides. Learners practise identifying reactants and products, completing word and chemical equations, and balancing equations for reactions such as metals and non-metals burning in oxygen. The practice questions below are drawn from ReClass's own question bank, based on real Grade 9 CAPS assessments, so learners can check their understanding of balancing equations against the kind of questions used in an actual test.

Worked example

4.3.1 Write down the balanced equation for the reaction:

Na + Cl_{2} \to NaCl

Answer & explanation

2 Na + Cl2→ 2 NaCl

You'll also practise

1.5 Which of the following statements is true regarding a balanced chemical equation?
2.2 Items on the left of a chemical equation
4.3.2 Write down the balanced equation for the reaction: $H_{2} + Br_{2} \to HBr$
4.3.3 Write down the balanced equation for the reaction: $N_{2} + O_{2} \to NO$
Lithium (Li) reacts with an unknown element X (atomic number 8) to form the compound Li2O. Write the balanced chemical equation for this reaction.
Sulphur is burned in oxygen gas inside a closed glass beaker. Write the balanced chemical equation for this reaction.
Write the balanced chemical equation to show how rust (iron oxide) forms when iron reacts with oxygen.
Carbon reacts with enough oxygen to burn completely. Write the balanced chemical equation for this reaction.
Hydrogen gas reacts with oxygen gas to form water. Write the balanced chemical equation for this reaction.
Identify the correctly balanced chemical equation from those given below.
Give the correct term: a chemical equation in which the reactants and the products have the same number of atoms of each element.
In the chemical equation CO + H2O → CO2 + H2, what scientific term is given to the substances on the right-hand side of the arrow?
In the chemical equation CO + H2O → CO2 + H2, name the two products formed by this reaction.
Give the correct term: substances that react together in a chemical reaction.
A magnesium ribbon is burnt in air, forming a white powder (magnesium oxide). Write the balanced chemical equation for this reaction.

Common mistakes

Forgetting to balance the number of atoms on both sides of the equation.
Confusing a coefficient (in front of a formula) with a subscript (within a formula).
Mixing up reactants and products when reading an equation.

Aligned to CAPS Grade 9 Natural Sciences and Technology — Chemical Equations.

Check your own understanding

Start a personalised Grade 9 Chemical Equations practice session on ReClass.

Practise this topic