Grade 9 · CAPS

Grade 9 Neutralization

Natural Sciences and Technology practice questions with answers

Grade 9 Neutralisation is part of the CAPS Natural Sciences and Technology curriculum, covering what happens when an acid reacts with a base to form a salt and water. Learners practise completing and balancing neutralisation equations, explaining how pH changes during the reaction, and naming real-life uses of neutralisation such as treating indigestion or acidic soil. 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 neutralisation reactions against the kind of questions used in an actual test.

Worked example

What term describes what happens when an acid reacts with a base?

Answer & explanation

Neutralisation

You'll also practise

  • 2.6 A chemical reaction where a strong acid reacts with a strong base to produce a salt
  • Choose an item from COLUMN B that matches a statement in COLUMN A. Write only the letter (A – I) next to the question numbers (3.1 to 3.6) in the space provided: 3.3 When you mix an equal volume of lemon juice (pH of 2) with a solution of sodium hydroxide (pH of 12). The expected pH will be ...
  • Magnesium oxide (pH 10) is added to hydrochloric acid (pH 1); the final solution has a pH of 6. Explain why the pH changed from 1 to 6.
  • Magnesium oxide (MgO) reacts with hydrochloric acid (HCl) in a neutralisation reaction. Write the balanced chemical equation for this reaction.
  • Give the correct term: a chemical reaction in which an acid and a base react to produce a salt and water.
  • A chemical reaction in which an acid reacts with a base to produce a salt and water is called …
  • Name any TWO real-life uses of neutralisation reactions.
  • Complete the chemical reaction: HCl + NaOH → ? + H2O
  • Complete the chemical reaction: H2SO4 + Mg(OH)2 → ? + 2H2O
  • What do we call the reaction between an acid and a base?
  • What is the general word equation for an acid-base (neutralisation) reaction?

Common mistakes

  • Forgetting that a neutralisation reaction always produces a salt and water.
  • Not balancing the salt and water correctly once the acid and base are identified.
  • Assuming the resulting solution is always exactly pH 7, rather than simply less acidic or less basic.

Aligned to CAPS Grade 9 Natural Sciences and Technology — Neutralization.

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