Question

why should a magnesium ribbon be cleaned before burning in air?​

Answer 1

Answer:

Magnesium ribbon should be cleaned with sandpaper before burning in the air. ... To remove the Magnesium oxide layer from theribbon which may prevent or slow down theburning of magnesium ribbon. Unwanted impurities deposited on the magnesium ribboncan be removed and only pure magnesium can be used for the reaction.

Answer 2

☘️ Answer:

Magnesium ribbon reacts with oxygen present in air to form a protective and inert layer of magnesium oxide on its surface. This layer is unreactive and prevents the ribbon from burning. Hence, it needs to be cleaned with sand paper before burning in air.