Corrosion

Investigating Rusting

Aim:

To investigate the factors that cause rusting in iron.

Method:

1. Label 6 test tubes and place in a test tube rack.

2. Test tube contents: Iron nail with tap water (A)

                                   "      "      with salty water (B)

                                   "      "      with water + oil (C)

                                   "      "      and calcium chloride.Sealed with a bung (D)

                                   "      "      with Mg ribbon wrapped around it (E)

                                   "      "      with nail polish (F)

3. Leave the test tubes undisturbed far at least three days.

Observation:

Test Tube	Conditions present or absent	Observations
A	Tap water	Rusted
B	Salty water	Top of nail rusted
C	Water and oil	No rust
D	Calcium chloride and bung	No rust
E	Mg ribbon wrapped around it	No rust
F	Nail polish	No rust