Why should we rub magnesium ribbon with sand paper before burning?

Question

Answer

It reacts with atmospheric oxygen gas and makes the magnesium oxide which covers the surface of Mg metal.So to remove the oxide layer, we should rub with sand paper.

Answer

When magnesium react with air or oxygen to form magnesium oxide which is form on their surface of metal so it is removed by sand paper

Answer

We should always rub magnesium ribbon before burning to remove carbonate and oxide from it

Answer

Magnesium is a moderately highly reactive metal due to which it reacts with oxygen present in air and layer of oxide is formed on it and to remove the layer of oxide it is rubbed with sand paper

Answer

Introduction:
Before burning magnesium ribbon, it is recommended to rub it with sandpaper. This process serves a crucial purpose in preparing the magnesium ribbon for combustion. Sandpaper helps remove the thin layer of oxide that forms on the surface of magnesium over time. This oxide layer can act as a barrier, hindering the reaction of magnesium with oxygen during combustion. By rubbing the magnesium ribbon with sandpaper, we ensure a clean surface that allows for a more efficient and complete combustion.

Importance of rubbing with sandpaper:

1. Removal of oxide layer:
When exposed to air, magnesium reacts with oxygen to form a layer of magnesium oxide on its surface. This oxide layer is a thin, powdery coating that can impede the reaction between magnesium and oxygen during burning. By rubbing the magnesium ribbon with sandpaper, we remove this oxide layer, exposing the clean magnesium underneath. This ensures a direct contact between magnesium and oxygen, facilitating a more vigorous reaction.

2. Increased surface area:
Rubbing the magnesium ribbon with sandpaper creates a rougher surface, increasing its overall surface area. A larger surface area allows for more contact between magnesium atoms and oxygen molecules during combustion. This enhanced contact promotes a faster and more complete reaction, resulting in a brighter and more intense flame.

3. Removal of impurities:
Sandpaper not only removes the oxide layer but also helps in getting rid of any impurities present on the surface of the magnesium ribbon. These impurities can interfere with the combustion process and affect the quality of the flame. By rubbing the ribbon, we eliminate any dirt, oils, or contaminants, ensuring a cleaner and purer burning experience.

Conclusion:
Rubbing magnesium ribbon with sandpaper before burning is essential to prepare the surface for combustion. It removes the oxide layer, increases the surface area, and eliminates impurities, allowing for a more efficient and intense reaction with oxygen. This process ensures a cleaner burn and enhances the quality of the flame produced.

Answer

Thanks for the answer

Answer

To  clean it

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