GCSEChemistryWJECRevision Notes2. Chemical Bonding, Application Of Chemical Reactions & Organic Chemistry2.2 Acids, Bases & SaltsDilute or Concentrated Acids

Dilute or Concentrated Acids (WJEC GCSE Chemistry): Revision Note

Exam code: 3410

Written by: Philippa Platt

Reviewed by: Caroline Carroll

Updated on 2 July 2026

Dilute or Concentrated Acids

A dilute acid has the acid molecules mixed with a large amount of water
Concentrated acids have little to no water molecules mixed with the acid molecules

Dilute and concentrated acids

A highly concentrated acid has a large number of acid molecules in the solution

Different acids can be dilute or concentrated but specific acids are strong or weak
For example
- Hydrochloric acid (pH 1) is classed as a strong acid which could either be dilute or concentrated
- Ethanoic acid (pH 3) is classed as a weak acid which again could either be dilute or concentrated

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Author: Philippa Platt

Expertise: Chemistry Content Creator

Philippa has worked as a GCSE and A level chemistry teacher and tutor for over thirteen years. She studied chemistry and sport science at Loughborough University graduating in 2007 having also completed her PGCE in science. Throughout her time as a teacher she was incharge of a boarding house for five years and coached many teams in a variety of sports. When not producing resources with the chemistry team, Philippa enjoys being active outside with her young family and is a very keen gardener

Reviewer: Caroline Carroll

Expertise: Head of Content Delivery

Caroline graduated from the University of Nottingham with a degree in Chemistry and Molecular Physics. She spent several years working as an Industrial Chemist in the automotive industry before retraining to teach. Caroline has over 12 years of experience teaching GCSE and A-level chemistry and physics. She is passionate about delivering high-quality resources to help students achieve their full potential.