Chemical ChangesDeep Dive

Deep Dive: The Core Neutralisation Reaction

Part of Neutralisation ReactionsGCSE Chemistry

This deep dive covers Deep Dive: The Core Neutralisation Reaction within Neutralisation Reactions for GCSE Chemistry. Revise Neutralisation Reactions in Chemical Changes for GCSE Chemistry with 20 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 13 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 13

Practice

20 questions

Recall

20 flashcards

🔬 Deep Dive: The Core Neutralisation Reaction

💧 H⁺ + OH⁻ → H₂O

This is the most important equation in acid-base chemistry. When hydrogen ions from an acid meet hydroxide ions from an alkali, they combine to form water — a neutral substance. The acid and alkali cancel each other out.

The general equation:

acid + alkali → salt + water

Example reactions:

HCl + NaOH → NaCl + H₂O

hydrochloric acid + sodium hydroxide → sodium chloride + water

H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O

sulfuric acid + potassium hydroxide → potassium sulfate + water

HNO₃ + NaOH → NaNO₃ + H₂O

nitric acid + sodium hydroxide → sodium nitrate + water

Keep building this topic

Read this section alongside the surrounding pages in Neutralisation Reactions. That gives you the full topic sequence instead of a single isolated revision point.

Practice Questions for Neutralisation Reactions

Which word equation correctly represents a neutralisation reaction?

  • A. acid + metal → salt + hydrogen
  • B. acid + metal carbonate → salt + water + carbon dioxide
  • C. acid + metal oxide → salt + hydrogen
  • D. acid + alkali → salt + water
1 markfoundation

Explain why the ionic equation for any strong acid-alkali neutralisation is always H⁺(aq) + OH⁻(aq) → H₂O(l).

2 marksstandard

Quick Recall Flashcards

HNO₃ + NaOH → ?
NaNO₃ + H₂O (sodium nitrate + water)
HCl + NaOH → ?
NaCl + H₂O (sodium chloride + water)

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