Question

why should a magnesium ribbon be cleaned before burning in air?​

Answer 1

Answer:

The magnesium ribbon should be cleaned before burning in the air because the layer of magnesium oxide (which is formed due to the reaction of magnesium with air ) can be removed in order to get the desired chemical reaction. Also in order to remove the oxide layer, the presence of which slowdowns the oxidation process.

Answer 2

Explanation:

Magnesium metal reacts readily with oxygen to form magnesium oxide and CO2 to form magnesium carbonate. These layers prevent the burning of magnesium ribbon IN air. Hence IT. should be cleaned with sand paper before burning IN air.

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