Question

why should a magnesium ribbon cleaned before burning? ​

Answer 1

Answer:

Explanation:

MAGNESIUM RIBBON WHICH IS EXPOSED TO ATMOSPHERE REACTS WITH OXYGEN GAS PRESENT IN THE ATMOSPHERE AND FORMS AN OXIDE COAT OVER THE MAGNESIUM RIBBON. THIS COATING ACTS AS A PROTECTIVE COATING WHICH PREVENT FURTHER OXIDATION OF THE MAGNESIUM RIBBON .IF THIS LAYER IS NOT REMOVED IT MAY AFFECT THE RESULT OF THE REACTION THAT HAS TO BE CARRIED OUT.

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Answer 2

The magnesium ribbon should be cleaned before burning in the air because the layer of magnesium oxide (which is formed due to the reaction of magnesium with air ) can be removed in order to get the desired chemical reaction. Also in order to remove the oxide layer, the presence of which slowdowns the oxidation process