Answer to Question #278593 in Physical Chemistry for Dolphy

Question

Why must magnesium ribbon be polished first before using it in a chemical reaction?

Answer 1

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