Question

when a magnesium ribbon is burnt in air, what are the two observations that you make​

Answer 1

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.

When a magnesium ribbon is burnt in air, the following observations we can make-

<>It burns with a white bright light.

<>Magnesium oxide is formed, as magnesium combines with oxygen.

<>Weight of magnesium will increase by one third.

When magnesium ribbon burns in air and forms magnesium oxide and lot of heat is produced.

2Mg +O2 --->2MgO + Q

From the above reaction, we can conclude that :

1. It is an exothermic reaction .

2. The magnesium oxide is basic in nature which can be tested by litmus test.

MgO+H2O ---> Mg(OH)2 

Litmus test : red litmus will turn to blue

All Metallic oxides are basic in nature.

Answer 2

The ribbon burns with a bright white light. Intense heat is also produced on this reaction. When magnesium ribbon burns it reacts with oxygen found in air to form a powdery ash call magnesium oxide..... Hope it helped you plzzz mark as brainliest....