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Redox reactions ?.

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Presentation on theme: "Redox reactions ?."— Presentation transcript:

1 Redox reactions ?

2 ?

3 Burning Magnesium in air

4 Oxidation is the gain of oxygen
When magnesium reacts with oxygen in the air: 2Mg + O2 2MgO It is easy to see that the magnesium has gained oxygen. We state that magnesium has been OXIDISED Write the balanced chemical equation

5 Reduction is loss of oxygen
When copper is extracted from copper (II) oxide, carbon is used to remove the oxygen 2CuO + C Cu + CO2 It is easy to see that oxygen has been removed from the copper (II) oxide We state that copper (II) oxide has been REDUCED Write the balanced chemical equation

6 Review & Fiddly stuff #1 2CuO + C 2Cu + CO2
Carbon has been OXIDISED WHY? Copper has been REDUCED WHY? We state that carbon is a reducing agent as it caused Copper to be reduced… We state that copper is an oxidising agent as it caused Carbon to be oxidised …

7 PbO + H2 Pb + H2O What has been OXIDISED ? What has been REDUCED ?
Which is the reducing agent ? Which is the oxidising agent ? PbO + H Pb + H2O [2]

8

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