why is it advised to Ribbon magnesium with Sandpaper for burning it in air
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magnesium is very reactive and it reacts with gases present in air to make magnesium oxide,hydroxide and carbonate which gets deposited on the surface of the ribbon. so to burn pure magnesium it is advised to clean it with a sandpaper so that the layer of these impurities can be removed.
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♤ 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.
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