Question

Why should a magnesium ribbon be cleaned before burning in air?

Answer 1

it is known to us that magnesium is a very reactive chemical.it reacts with oxygen and forms a oxide layer called the magnesium oxide layer this must be cleaned to perform the desired chemical reaction to get the exact and right results.so ,it is rubbed with sandpaper which breaks and cleans the oxide layer.hope this answer helps .

Answer 2

♤ When Magnesium ribbon is exposed in the atmosphere it form a layer of magnesium oxide on its surface.

♤ This layer of magnesium oxide is stable compound to prevent further reaction of magnesium with oxygen.

♤ Hence, it should be cleaned before burning in air to remove this layer so that the metal can be exposed to air properly.