Why should magnesium ribbon be cleaned before burning?
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Explanation:
As magnesium is very reactive metal and when it is stored , it gets covered by a layer of magnesium oxide which prevents it from burning.
This layer is cleaned in order to burn the magnesium ribbon properly.
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Answer:
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.
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