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Question

What is chemical formula of rust?

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Solution

Corrosion: Corrosion is the process of slowly eating up metals by gas and water vapours present in the atmosphere due to the formation of certain compounds like oxide, sulphides, carbonate, etc.

Rust:

  • Corrosion of iron is known as rusting.
  • Rust is the hydrated Ferric oxide with having chemical formula Fe2O3.xH2O.
  • When Iron comes in contact with oxygen in presence of moisture(Water), a reddish-brown coating is formed on the surface of Iron which is called rust.
  • The chemical reaction can be represented as:
  • 4FesIron+3O2gOxygen+2xH2OaqWater ā†’2Fe2O3.xH2O(aq)Rust

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