Observations: Create observation tables and record what you observed in Factors That Affect Corrosion. Please note that you will be asked to submit this lab work in the assignment section of this activity. Discussion Questions: 1. What test can be used to determine the oxidation of iron? 2. Which test tubes showed signs of corrosion? 3. Which test tubes contained early signs of corrosion? Explain. 4. Explain why no corrosion occurred on the control nail. 5. Compare your results to the sealed control nail. What factors are different from the control that could have caused corrosion? 6. The half reactions for the first stage of redox can be written as follows: Oxidation: Fe ---> Fe 2+ + 2eReduction: 2H2O + 2e- ---> 2OH 1- + H2 (g) a. What colour in the agar should indicate where oxidation has occurred? b. What colour should indicate where reduction has occurred? c. According to the above reduction equation, what additional observation should be made at the reduction site in addition to a colour change? 1. After examining the results of the wrapped nails, which seemed to promote rusting and which seemed to prevent rusting? Using your reactivity series, provide a reason for your observations. 2. After examining the bent and straight nail, what signs of reduction and oxidation are present? 3. Match the following corrosion factors with the procedure in which they were demonstrated: Corrosion due to single displacement reaction Corrosion due to the presence of strong electrolytes Corrosion due to mechanical stress Corrosion due to contact between two different electrodes Corrosion due to heat.