identify the substances that are oxidised and the substances that are reduced in the following reactions:
1. 4Na + O2 == 2Na2O
2. CuO + H2 == Cu + H2O
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Step-by-step explanation:
(i) oxidation: Na → Na
+
+ $$e^$$ (formation of sodium ion)
(ii) reduction: O
2
+ $$2e^$$ → O
2
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