why should the magnesium ribbon cleaned before use in the experiment
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the magnesium ribbon should be cleaned before use in the experiment with sandpaper to remove any excess oxide layer deposited over the metal
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Magnesium is a highly reactive metal. When exposed to air for a long time it gets coated with the layer of oxide which is physically and mentally stable and therefore, partly masks the reactivity of magnesium. The oxide coating does not burn when a flame is brought in contact with the metal. Therefore, the surface should be cleaned, with a sandpaper before burning the magnesium ribbon in air.
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