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Chemical Reactions and Equations
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03/09/2021 1:12 pm
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Identify the substances that are oxidised and the substances that are reduced in the following reactions:
(a) 4Na(s) + O2(g) ➝ 2Na2O(s)
(b) CuO(s) + H2(g) ➝ Cu(s) + H2O(l)
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03/09/2021 1:13 pm
(a) In this reaction, sodium (Na) is oxidised to sodium oxide (Na2O). This means that oxygen (O2) gets reduced.
(b) In this reaction, hydrogen (H2) is oxidised to form water (H2O) while copper(II) oxide (CuO) is reduced to copper (Cu).