Question

why should we clean the magnesium ribbon for burning

Answer 1

magnesium react with oxygen to form magnesium oxide which doesnt burn. to avoiding of reaction it is cleaned....

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.