1. Starter: in pairs brainstorm as many different TYPES of reaction as you know Types of Chemical Reaction

2. Neutralisation This is the type of reaction that occurs when an ACID is mixed with an ALKALI to produce a NEUTRAL solution. ACID + ALKALISALT + WATER Can you think of 3 examples of neutralisation reactions? Extension – when can knowing about neutralisation reactions be useful?

3. Neutralisation A use of neutralisation is in the treatment of indigestion. The acid in the stomach is hydrochloric acid (HCl) Hydrochloric + MagnesiumMagnesium + Water Acid Carbonate Chloride HCl + MgCO 3 MgCl 2 + H 2 O Word Equation Symbol Equation What do these large numbers stand for?

4. Measuring the strength of an acid or alkali Not all acids/alkalis are the same strength, so we use the pH scale to explain it

5. A neutral pH means there is no acid or alkali present. Neutral pH is 7. Adding an alkali to an acid brings its pH closer to 7.

6. A neutral pH means there is no acid or alkali present. Neutral pH is 7. Adding an acid to an alkali brings its pH closer to 7.

7. You have 3 antacids, their pHs are: Antacid A – pH 9 Antacid B – pH 13 Antacid C – pH 10.5 Which of these will be better at neutralising the Hydrochloric Acid if you have to use the same amount of each? The extremes of the pH scale are very harmful to human beings. Which antacids do you think you should rule out using because of this?

8. You have 3 antacids, the mass required to fully neutralise stomach acid is: Antacid A – 84g Antacid B – 50g Antacid C – 70g The cost per 100g is: Antacid A – 67p Antacid B – 98p Antacid C – 59p Which of these is the most cost effective? What factors will affect the RRP of the antacid?

9. Oxidation This is the type of reaction that occurs when a metal is combined with oxygen to form a metal oxide. METAL + OXYGENMETAL OXIDE What is the most common type of oxidation reaction?

10. Oxidation Oxidation is the process behind the rusting of iron. It weakens nails, bikes and other metal objects as the metal oxide is not as strong Iron + OxygenIron Oxide 2Fe + 3O 2 2Fe 2 O 3 What do these large numbers stand for?

11. Combustion This is the type of reaction that occurs when a fuel is combined with oxygen to produce water and carbon dioxide releasing energy FUEL + OXYGENCARBON + WATER DIOXIDE What do we use combustion reactions for? Extension – what biological combustion reaction have we studied?

12. Combustion Combustion is used to power cars, buses, aeroplanes etc. The fuel is petrol, whose chemical name is octane Octane + Oxygen Carbon + Water Dioxide C 8 H 18 + O 2 CO 2 + H 2 O Is there the same amount of each element on either side of the arrow?

13. Combustion When we write symbol equations we have to make sure that they are BALANCED i.e. That there is the same number of each element on either side of the arrow. C 8 H 18 + O 2 CO 2 + H 2 O 2C 8 H 18 + 27O 2 16CO 2 + 18H 2 O Don’t panic! I will show you how to balance equations next week.

14. Decomposition This is the type of reaction that occurs when an large compound is broken down into smaller compounds Compound 1 Compound 2 + Compound 3 Can you think of any examples of decomposition reactions?

15. Decomposition An example of decomposition is the fermentation of glucose to form ethanol and carbon dioxide Glucose Ethanol + Carbon Dioxide When is this reaction used? C 6 H 12 O 6 2C 2 H 5 OH + 2CO 2 Word Equation Symbol Equation

16. Thermal Decomposition An example of thermal decomposition is the breakdown of calcium carbonate into calcium oxide and carbon dioxide Calcium Carbonate Calcium + Carbon Oxide Dioxide Try to write the symbol equation using the periodic table to help CaCO 3 CaO + CO 2

17. Displacement This is the type of reaction that occurs when a more reactive element takes the place of a less reactive one in a compound Compound + Element 1 2 2 1 Can you think of any examples of displacement reactions?

18. Zinc Copper + Zinc Zinc + Copper Sulphate Sulphate Sulphate Displacement An example of displacement is the decolourisation of copper sulphate (blue) by zinc Word Equation Try to write the symbol equation using the periodic table to help. The symbol for sulphate is SO 4 ZnSO 4 CuSO 4 + Zn ZnSO 4 + Cu

19. Metals and Acid This is the type of reaction that occurs when a metal reacts with an acid to form a salt and hydrogen gas METAL + ACID SALT + HYDROGEN What is a test for hydrogen gas?

20. Metals and Acid An example of this type of reaction occurs when magnesium is placed in sulphuric acid Magnesium + Sulphuric Magnesium + Hydrogen Acid Sulphate Try to write the symbol equation using the periodic table to help. The symbol for sulphate is SO 4 Mg + H 2 SO 4 MgSO 4 + H 2