Chemistry, asked by dmom218, 1 year ago

please help me............
1.when magnesium is left in moist air for several hours,the metal surface tarnishes WHY? explain

Answers

Answered by Umachandru238
40

When magnesium is left out in moist air it reacts with the oxygen in the atmosphere and forms magnesium oxide which prevents it from further reaction.

2Mg + o2 ———> 2mgo


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Answered by OlaMacgregor
12

When magnesium is left in moist air for several hours, the metal surface tarnishes due to the formation of an oxide or hydroxide layer on its surface.

Explanation:

  • When magnesium is left in moist air for several hours then oxygen present in the air will react with the metal leading to the formation of an oxide or hydroxide layer on surface of the metal.
  • As a result, the metal will tarnish due to the presence of a layer on its surface. This oxide layer is might be magnesium oxide or hydroxide layer could be magnesium hydroxide.
  • Its chemical formula is MgO_{2} and Mg(OH)_{2}. This oxide layer will prevent further reaction of the metal.

Learn more about tarnishing of metal:

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