Question

why should a magnesium ribbon be cleanned before burning in air

Answer 1

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● 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.

Answer 2

Answer:

Magnesium ribbon should be cleaned before burning in the air so as to remove the layer of magnesium oxide formed due to reaction between magnesium and air as the presence of this oxide layer slows down or prevents the burning process.