Neutralisation
Neutralisation is the reaction of an acid with a base that forms a salt and water, bringing the pH towards 7.
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Neutralisation is the reaction of an acid with a base that forms a salt and water, bringing the pH towards 7.
- Acid plus alkali gives salt plus water
- Antacids neutralise stomach acid
- Titration measures the exact amount needed
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Neutralisation?
Within Chemistry, which covers atoms, bonding, reactions, the periodic table, organic chemistry and the chemistry of everyday life, this topic explains Neutralisation. Chemistry links what you can see in the lab to the particles and bonds behind it, so each topic here shows that link in a model.
Check that you can explain Neutralisation in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Neutralisation helps you explain why substances behave as they do, from cleaning products and food to medicines.
Neutralisation in detail
Neutralisation is the reaction between an acid and a base (or alkali) that produces a salt and water, with the ionic equation H⁺ + OH⁻ → H₂O. The pH moves toward 7. Indigestion tablets neutralise excess stomach acid, and farmers add lime to acidic soil.
The salt depends on the acid used: hydrochloric acid gives chlorides, sulfuric acid gives sulfates and nitric acid gives nitrates. For example, NaOH + HCl → NaCl + H₂O. The reaction releases heat, which can be measured with a thermometer. Indicators or pH probes show when it is complete.
How the interactive helps you understand Neutralisation
Watch the pH scale in the interactive. Use any sliders or buttons it offers to change the values and see how the pH scale responds.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Neutralisation.
Real-life uses and examples
- Use Neutralisation to explain what happens in a lab experiment and why.
- Link Neutralisation to everyday products such as cleaning agents, food and medicines.
- Read a chemical equation or diagram and work out what Neutralisation shows.
Common mistakes to avoid
- Describing what happens without explaining the particles or bonds involved.
- Mixing up the names of substances or ions when you describe Neutralisation.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Neutralisation
What is Neutralisation?
Neutralisation is the reaction of an acid with a base that forms a salt and water, bringing the pH towards 7.
What are the most important points about Neutralisation?
The main points are: Acid plus alkali gives salt plus water; Antacids neutralise stomach acid; Titration measures the exact amount needed.
Why is Neutralisation useful?
Understanding Neutralisation helps you explain why substances behave as they do, from cleaning products and food to medicines.
How can I practise Neutralisation?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Neutralisation?
Related topics in Chemistry include Titration, Extraction of Metals, Electrolysis.