Aim: To investigate the factors that cause rusting in iron.
Equipment: Four test tubes, test tube rack, a bung, four iron nails, boiled water, tap water, saltwater, cooking oil, calcium chloride.
Method: 1. Label four test tubes A - D and place them in a test tube rack.
2. Test tube contents: A= Iron nail and tap water.
B = Iron nail and salty water.
C = Iron nail, boiled water, oil.
D = Iron nail and calcium chloride. Sealed with a bung.
Conclusion: Oxygen and water make metal rust quicker, If you seal of the oxygen it will rust slower.
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