1. pH scale pH scale • Indicators can be used to find out whether a solution is acid, alkaline or neutral • Universal Indicator can be used to find the pH of a solution • Acid – red, pH less than 7 • Neutral – green, pH = 7 • Alkali – blue, pH greater than 7

2. pH scale pH scale

3. pH scale pH scale

4. pH scale pH scale

5. Neutralisation Neutralisation • Acids react with alkaline solutions to form a salt and water • Hydrochloric acid produces chlorides • Nitric acid produces nitrates • Sulphuric acid produces sulphates • Ammonia can dissolve in water to produce an alkaline solution. This can be neutralised with acids to produce ammonium salts • Indicators can monitor neutralisation reactions

6. Neutralisation – Hydrochloric acid Neutralisation

7. Neutralisation – Sulphuric acid Neutralisation

8. Neutralisation – Nitric acid Neutralisation

9. Neutralisation – Fertiliser Neutralisation

10. Reaction of Metals and Acid Reaction of Metals and Acid

11. Metal Oxides & Hydroxides Metal Oxides & Hydroxides • Transition metal oxides and hydroxides do not dissolve in water. They are called bases • They react with acids to produce salts that are soluble • The excess metal oxide can be filtered off

12. Wordsearch Wordsearch

13. Quiz Quiz