Question

magnesium ribbon burns in air and changes to white substances , i.e , magnesium oxide. When magnesium oxide dissolves water , what type of change take places ? Give reason in support of your answer . Express the change in the form of equation.​

Answer 1

Answer:

Mg+O2 - Mgo Mgo+H2o - Mg(OH)2

Explanation:

magnesium burn in air form magnesium oxide.when magnesium oxide disolve in water it forms magnesium hydroxide which is base. it can known by red litmus paper.

Answer 2

Answer:

Mixing of ash obtained by the burning of magnesium with water is a chemical change. When magnesium is burnt in air, it forms magnesium oxide in the form of white ash.

Magnesium (Mg) + Oxygen (O2) –› Magnesium oxide (MgO)

When magnesium oxide dissolves in water, it forms a new substance, magnesium hydroxide.

Magnesium oxide (MgO) + Water (H2O) –› Magnesium hydroxide Mg(OH2)

So, it is a chemical change.