Question

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

Answer 1

Answer:

hey there mate!!

Here is your 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 >> 2Mg+O2=2MgO)

should be removed in order to get the desired chemical reaction.

hope it helps!!

Answer 2

Answer:

It should cleaned before burning to remove layer of magnesium oxide. This layer is unreactive and prevent ribbon from burning.