Question

Identify the substances that are oxidised and the substance are reduced in the following reactions: 4na(s)+o2(g) 2na o2(s). Cuo+h2(g) cu(s)+h2o(l)

Answer 1

Answer:

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in it I explained

Answer 2

(i) 4Na + O2 => 2Na2O

In this reaction, Na is oxidized because it combines with O2 to form Na2O. O2 is reduced because it is converted into Na2O.

(ii) CuO + H2 => Cu + H2O

In this reaction, CuO is reduced because it loses oxygen. H2 is oxidized because it combines with oxygen of CuO to form water