Wednesday, November 17, 2010

Chem SPM 2010: Rusting of Iron

- Metal place HIGHER in ECS is more electropostive
- When the more electropositive metal in contact with iron 
  nail (Ferum, Fe), the metal will PREVENT the rusting of 
  iron.
- Examples: K, Na, Ca, Mg, Al, Zn, .....

* Metal placer LOWER in ECS is less electropositive
* When the less electropositive metal in contact with iron nail 
  (Ferum, Fe), the metal will cause the RUSTING of iron.
* Examples: Cu, Ag, Au 

1 comments:

  1. - Metal place HIGHER in ECS is more electropostive
    - When the more electropositive metal in contact with
    iron nail (Ferum, Fe), the metal will PREVENT the
    rusting of iron.
    - Examples: K, Na, Ca, Mg, Al, Zn, .....

    * Metal placer LOWER in ECS is less electropositive
    * When the less electropositive metal in contact with
    iron nail (Ferum, Fe), the metal will cause the
    RUSTING of iron.
    * Examples: Cu, Ag, Au

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