Question

why shoud magnesium ribbon be cleaned  before burning in air???

Answer 1

i think Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly...........
plz make it best.........................

Answer 2

magnesium ribbon should be cleaned before burning to remove out the oxide layer from it which may prevent or slow down the burning of magnesium ribbon