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- 2. Acids and alkalis Solutions can be sorted by whether they are: acid, alkali or neutral. When
- 3. When the oxide of some non-metals dissolve in water they make an acid. Acids have a
- 4. Acids react with metals and carbonates. Metal + Acid Salt + Hydrogen magnesium + magnesium chloride
- 5. Acids Lemon juice contains citric acid, and vinegar contains ethanoic acid. Some strong acids are hydrochloric
- 6. Neutralisation Acids and alkalis react with each other. The alkali cancels out the acid in the
- 7. Salts The salt made depends on the acid and alkali used. The salt contains the metal
- 8. Alkalis When the oxides of some metals dissolve in water they make an alkali solution. Alkalis
- 9. Alkalis Alkalis are present in many cleaning substances in use in our homes. Kitchen cleaners are
- 10. Indicators They change colour in acid or alkaline solutions. Different indicators change to different colours. Indicators
- 11. Litmus Test Litmus is an indicator. It changes colour in acid and alkaline solutions. Litmus is
- 12. Universal Indicator Universal indicator changes colour in acids and alkalis. Its colour shows the strength of
- 13. The pH scale 1 – 6 8 - 14 Alkalis 7 Neutral Acids
- 14. Applications of Neutralisation Indigestion: Our stomach carries around hydrochloric acid. Too much of this leads to
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