What happens when magnesium ribbon is burnt in air? What type of subst

1.	What happens when magnesium ribbon is burnt in air? What type of substance is formed when it is dissolved in water?
Answer» 1. Take a small piece of Magnesium ribbon. Burn it on a flame of candle. 2. We will find brilliant white dazzling light leaving a powdery substance behind. 3. When Magnesium burns in the presence of Oxygen, it forms Magnesium Oxide in the form of powder ash, which is a new substance. 4. Thus there is a change in the composition. 5. Magnesium + Oxygen → Magnesium Oxide. 6. Collect the ash and mix it with a small quantity of water and dissolve it. Another new substance is formed. 7. Magnesium Oxide + Water → Magnesium Hydroxide 8. Test the dissolved mixture with blue and red litmus papers to decide whether it is a acid or a base. 9. We notice that the litmus paper turns blue. 10. This means that magnesium hydroxide is basic in nature. 11. As all these are new substances all these changes are chemical changes.

What happens when magnesium ribbon is burnt in air? What type of substance is formed when it is dissolved in water?

Answer»

1. Take a small piece of Magnesium ribbon. Burn it on a flame of candle.

2. We will find brilliant white dazzling light leaving a powdery substance behind.

3. When Magnesium burns in the presence of Oxygen, it forms Magnesium Oxide in the form of powder ash, which is a new substance.

4. Thus there is a change in the composition.

5. Magnesium + Oxygen → Magnesium Oxide.

6. Collect the ash and mix it with a small quantity of water and dissolve it. Another new substance is formed.

7. Magnesium Oxide + Water → Magnesium Hydroxide

8. Test the dissolved mixture with blue and red litmus papers to decide whether it is a acid or a base.

9. We notice that the litmus paper turns blue.

10. This means that magnesium hydroxide is basic in nature.

11. As all these are new substances all these changes are chemical changes.