why should a magnesium ribbon be cleaned before burning in air?
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Magnesium is a very reactive metal. When it is kept in the open air it can react with the gases present in the air. Cleaning will remove those impurities formed due to the reaction with air. ... - This high reactive nature of magnesium is the reason why magnesium ribbons should be cleaned before using it.
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Megnesium is a very recative metal. When stored, it reacts with oxygen to form a layer of magnesium oxide on its surface.
The magnesium ribbon is cleaned by stand paper for removing this layer so that the underlying metal can be expose to air.
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