Corrosion

Aim-
To investigate the factors that cause rusting in iron.

Equipment-
-Six test tubes
-Test tube rack
-A bung
-Six iron nails
-Boiled water
-Tap water
-Saltwater
-Cooking oil
-Calcium chloride
-Nail polish
-Magnesium

Method-
-Label six test tubes A-D and place in a test tube rack
-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
                                E=Iron nail and nail polish (thin layer)
                                F=Iron nail and a magnesium piece wrapped around the nail.

Observations-
All the nails that had contact with liquids had begun to rust and the one with calcium chloride sealed with a bung, did not rust.