• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigating the causes of Corrosion to Iron.

Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  • Essay length: 1190 words
  • Submitted: 18/08/2003
Share this essay:
GCSE Aqueous Chemistry

The first 200 words of this essay...

Investigating the causes of Corrosion to Iron

Hypothesis

I believe that iron needs both oxygen and water in order to form iron oxide (rust). I also believe that iron oxide formation will not occur when neither oxygen nor water is present (test tube numbers 2, 3, 5, and 8).

Certain factors can affect the reaction rate: limiting reactants i.e. the amount of water, oxygen and iron present and higher temperatures cause a faster reaction rate.

Other reactants may change the reaction completely or alter the reaction rate. In order to test this I added magnesium and salt. Different concentrations of these reactants (diluted and saturated) should also change the reaction rate.

Iron can be coated by a more reactive metal i.e. zinc. This is called galvanization. The zinc is higher up in the reactivity series which causes the oxygen and water to react with the zinc. This is called sacrificial protection because the zinc sacrifices itself to protect the iron. Zinc is often used to protect iron.

The formula for this reaction is:

Oxygen + Iron + Water ? Iron Oxide

O2 + 2Fe + H2O ?

Read more
The above preview is unformatted text

Found what you're looking for?

  • Start learning 29% faster today
  • Over 150,000 essays available
  • Just £6.99 a month

Marked by a teacher

This essay has been marked by one of our great teachers. You can read the full teachers notes when you download the essay.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the essay page.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review under the essay preview on this page.