Question

whh should a magnesium ribbon be cleaned before burninv in air

Answer 1

Magnesium ribbon should be cleaned before burning in air to remove the magnesium carbonate layer formed above it......the carbonate layer reduces chances of a proper burning hence to make the burning uninterrupted and effective the magnesium ribbon has to be cleant.

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.