Question

magnesium ribbon be cleaned before burning it in air why​

Answer 1

hey there..!!

magnesium ribbon must be cleaned before burning in air so that the layer of magnesium oxide can be removed in order to get the desired chemical reaction..

hope it helps uh..!!❤❤

Answer 2

magnesium ribbon reacts with carbon dioxide present in the air to form a protective and inert layer of magnesium carbonate. This layer is unreactive and hence, needs to be cleaned with sand paper before burning in air.