Question

Write your observation when magnesium ribbon is burnt in air

Answer 1

Answer:

Explanation:

The ribbon burns with a bright white light. Intense heat is also produced in this reaction. Here, when magnesium burns, it reacts with the oxygen found in air to form a powdery ash called magnesium oxide. Chemical equation: Magnesium plus Oxygen gives Magnesium oxide.

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Answer 2

Answer:

Magnesium burns with a dazzling white flame and produces a white colored ash of magnesium oxide.

Explanation:

When magnesium is burnt in air, it forms a basic oxide called magnesium oxide. The chemical equation representing this chemical change is as below:

2Mg + O₂ --------------->  2MgO

It can be checked that MgO is basic in nature by mixing it with water.

MgO + H₂O -------> Mg(OH)₂

When Mg(OH)₂ is tested with litmus, it turns blue, showing that it is basic in nature.

In fact, it is a property of most metals that they form basic oxides upon reacting with oxygen. (Exceptions are Aluminium, Zinc etc.)