Why should a magnesium ribbon be cleaned before burning in air ?

Question

Answer

Magnesium ribbon is clean before burning to remove protective oxide coating from the surface..

Answer

Remove the layer of oxide.

Answer

Magnesium is very reactive metal. It forms magnesium oxide when it reacts with oxygen. When magnesium ribbon is stored a stable layer of magnesium oxide is formed over the surface of magnesium ribbon and prevents the further reaction of magnesium with oxygen. Therefore, the magnesium ribbon is cleaned with sand to remove this layer before burning.

Answer

Magnesium react with substances in karane karm oxides, sulphide, nitride etc
so the top layer is not found in pure form

Answer

Why should a magnesium ribbon be cleaned before burning in air?

Introduction:
Before burning a magnesium ribbon in air, it is important to clean the ribbon to ensure a successful and efficient reaction. Cleaning the magnesium ribbon removes any impurities or oxide layers that may hinder the reaction. This process allows for a cleaner and more controlled burning of the magnesium ribbon.

Reasons for cleaning:
1. Removal of impurities: Magnesium ribbons are often manufactured with a protective coating to prevent oxidation during storage and transportation. This coating can contain impurities such as oils, dirt, or other contaminants that may interfere with the reaction. Cleaning the ribbon helps to remove these impurities and ensures a pure magnesium surface for the combustion process.

2. Elimination of oxide layer: Magnesium readily reacts with oxygen in the air to form magnesium oxide (MgO) on its surface. This oxide layer can act as a barrier, preventing the magnesium from efficiently reacting with the oxygen during combustion. Cleaning the ribbon removes this oxide layer, allowing for direct contact between the magnesium and the oxygen in the air.

Procedure for cleaning:
1. Scraping: Gently scrape the surface of the magnesium ribbon with a spatula or a knife to remove the protective coating and any visible impurities. This process exposes a fresh layer of magnesium for the reaction.

2. Sanding: If necessary, sand the ribbon using fine-grit sandpaper to further remove any stubborn oxide layers or impurities. This step helps to ensure a clean and reactive surface.

3. Washing: Rinse the ribbon with a suitable solvent, such as acetone or ethanol, to remove any remaining contaminants. This step helps to achieve a completely clean surface by dissolving any organic impurities.

4. Drying: After washing, allow the ribbon to air dry or use a clean cloth or paper towel to gently dry it. It is essential to ensure that the ribbon is completely dry before proceeding with the combustion process.

Conclusion:
Cleaning a magnesium ribbon before burning it in air is crucial to remove impurities and oxide layers. This process ensures a clean and reactive surface for the combustion reaction, resulting in a more efficient and controlled burn. By following the proper cleaning procedure, the magnesium ribbon can be prepared for a successful reaction with oxygen in the air.

Answer

Before burning in air, magnesium ribbon is cleaned with sandpaper. this is done to remove the protective layer of basic magnesium car carbonate from the surface of the magnesium ribbon so that it may readily combine with the oxigen of air.

hope this helps:-)

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Why should a magnesium ribbon be cleaned before burning in air?

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