Chemistry - Rusting

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  • Created by: becky.65
  • Created on: 11-05-15 17:45
What's the difference between rusting and corrosion?
Rust refers to the oxidation of iron, steel or the iron oxide that is produced. Corrosion is more of a general term, which technically refers to the wearing away of a metal through a chemical reaction.
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What are the conditions needed for rust to occur?
Both air and water need to be present
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What is rust?
A form of iron(iii) oxide that was water loosely bounded to it. It is called a hydrated iron(iii) oxide
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What is the equation for the rust reaction?
iron + oxygen + water --> hydrated iron(iii) oxide
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What's one way to prevent iron from rusting?
Coating the iron or steel with paint, oil or grease and plastic therefore providing a barrier between iron and any air and water
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What's another way to prevent iron from rusting?
Galvanizing is the coating of a metal with a more reactive metal to stop corrosion. Normally zinc is used to coat iron. The zinc coating corrodes instead of the iron, stopping the iron from corroding
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What's another way to prevent iron from rusting?
Sacrificial protection works by taking a metal higher up the reactivity series and connecting it to the iron/steel and donates its electrons to any iron ions that might have formed, stopping it from corroding
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Card 2

Front

What are the conditions needed for rust to occur?

Back

Both air and water need to be present

Card 3

Front

What is rust?

Back

Preview of the front of card 3

Card 4

Front

What is the equation for the rust reaction?

Back

Preview of the front of card 4

Card 5

Front

What's one way to prevent iron from rusting?

Back

Preview of the front of card 5
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