Question

Magnesium ribbon should be clean by a sand paper before burning justify the statement

Answer 1

HEYA!!
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〰A Magnesium Ribbon should be cleaned with a Sand paper before Burning .

➡This is because the magnetism ribbon has a layer of oxide on it . This hinders its burning . Cleaning it removes the layer of oxide .

The reaction of magnesium with oxygen is as follows ➡

2 Mg + O2 --------------------------------------------------- 2 MgO.

✨Magnesium burns with a White Dazzling flame reducing to a White powder representing table salt.

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Answer 2

♤ When Magnesium ribbon is exposed in the atmosphere it form a layer of magnesium oxide on its surface.

♤ This layer of magnesium oxide is stable compound to prevent further reaction of magnesium with oxygen.

♤ Hence, it should be cleaned before burning in air to remove this layer so that the metal can be exposed to air properly.