1. Simple Chemical Reactions
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Simple Chemical Reactions
W Richards
The Weald School

2. Testing for hydrogen
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“POP”

3. Words – gold, corroded, fizzes, disappear
Adding acids to metals
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If an acid is added to a (fairly reactive) metal the metal will be quickly ________ by the acid. We can see a reaction happening because the mixture _________ and the metal eventually __________.
Some metals, like ____, are so unreactive that nothing will happen.
Words – gold, corroded, fizzes, disappear

4. Testing for carbon dioxide
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Gas
Limewater
Limewater turns milky/cloudy

5. Adding acid to carbonates
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Carbonates are compounds containing carbon and oxygen. When an acid is added to a carbonate the carbonate starts to _______. A gas called ______ _______ is produced.
Carbonates used to be used as building materials but aren’t any more because acid rain would eventually ________ the building.
Words – dissolve, fizz, carbon dioxide, oxygen

6. Burning things
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When something is burned it reacts with oxygen. For example:
Magnesium + oxygen Magnesium oxide
Carbon + oxygen Carbon dioxide
Sulphur + oxygen Sulphur dioxide
Fire
The Fire Triangle
Oxygen
Fuel
Heat

7. Fuels
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Fuels are substances that can be used to release useful amounts of energy when they burn, e.g.
Wood
Gas
Oil