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Across 4. The chemical produced by a neutralisation between an acid and a base 5. a chemical detector which changes colour for acids and bases. 6. a compound which donates a hydrogen ion (H+) to another compound.A compound witha sour tatse 8. A low concentration of acid in a solution 9. A scale from 0 – 14 which indicates the strength of an acid or base.

Down 1. A chemical reaction in which an acid and a base react to produce salt and water 2. An acid which quickly forms a high level of hydrogen ion (H+) 3. A base which dissolves in water 7. a compound which neutralises an acid by accepting a hydrogen ion (H+)