1)Roll a 5-cm thick aluminium foil paper into a cylinder just small enough to fit on the inside of the 120ml beaker.
2)Pour water to the 120ml mark, and put the aluminium foil inside,
3)Use crocodile clips to connect a battery holder and battery of D-size to the aluminium foil, on opposite ends of the foil that are still sticking out of the water.
4)Label the beaker 100˚c.
5)Repeat steps 1-4 twice more, labelling them 20˚c and 30˚c.
Conducting the experiment.
1)Place unrusted paperclip in water for 2 weeks for all 3 beakers.
2)Scrap rust off the paper clip into the water.
3)Weigh filter paper. (Let mass be r)
4)Use filter paper to separate rust and water, for all three beakers.5)After weighing, take mass minus r to get the mass of rust.
2.4 Risk Assessment and Management
As experiments involve heating, there is a risk of scalding the hand accidently.
Use gloves or tongs when carrying out the experiment
As the experiment involves glassware, there is a risk of breakage and cutting of the hands.
Wear gloves when carrying out the experiment. In case of breakage, the cut to the hands will be minimized.
We will be using a hot plate and there is a risk of touching the hot plate and burning our hands.
Be alert while using the Hot Plate
2.5 Data Analysis
- Weigh the paper clips using an electronic scale at the end of the paper clips
- Plot the results in a table
- Compare the results using a histogram (time against alteration to temperature)
- Plot a histogram with X axis for temperature and Y axis for time)
- In the graph, the first bar for 20˚c will be a little higher than the third bar for 100˚c, and the highest will be the second bar, for 30˚c.
- From the data, I can conclude that increasing the temperature also increases the rate of formation of rust, but at a certain point the rate of formation slows down, as the bars will be put in increasing height, and yet it is at it’s top in the middle.