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Limewater - GCSE Chemistry Definition

Reviewed by: Richard Boole

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Limewater is a clear solution made by dissolving calcium hydroxide in water. In GCSE Chemistry, it is often used as a simple test for carbon dioxide gas. When carbon dioxide is bubbled through limewater, it turns cloudy or milky because calcium carbonate is formed. This reaction is a classic example of a chemical change, helping students understand concepts like reactions and gas testing. Limewater is important in experiments related to acids, bases, and compounds containing calcium, making it a useful substance to know about in chemistry studies.

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Richard Boole

Reviewer: Richard Boole

Expertise: Chemistry Content Creator

Richard has taught Chemistry for over 15 years as well as working as a science tutor, examiner, content creator and author. He wasn’t the greatest at exams and only discovered how to revise in his final year at university. That knowledge made him want to help students learn how to revise, challenge them to think about what they actually know and hopefully succeed; so here he is, happily, at SME.

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