Methods

2.1 Equipment list: 
15 Beakers
0.5 litre of Hydrochloric Acid per mol
0.5 litre of Sulphuric Acid per mol
0.5 litre of Citric Acid per mol
18 iron angle (L Bracket) with dimensions of 5cm by 1.5cm by 0.2 cm
Weighing machine (Microbalance)  

2.2 Procedures: Detail all procedures and experimental design to be used for data collection

1. Weigh 1 iron angle on a microbalance before the start of the experiment
2. Prepare 6 petri dishes
3. Add 60ml hydrochloric acid molarity 1 to the 3 petri dishes
4. Add 60ml hydrochloric acid molarity 2 to the other 3 petri dishes
5. Place the metal angle in the acid vertically and leave it for 25hrs
6. After 25hrs, remove the metal angles from the acid using gloves
7. Wipe away any residue but be careful not to wipe away the rust
8. Weigh the iron three iron angles with the microbalance and record the data in the logbook
9. Repeat steps 2 to 8 for the Sulphuric and Citric acid



*(1 mol = 100ml acid + 900ml deionised water (acid is directly proportionate to deionised water))
**(Repeat to create the acid with molarities of 1 and 2)


2.3 Risk and Safety: Identify any potential risks and safety precautions to be taken.

1.  As the experiment involves metal rusting, avoid getting cut by the rust as tetanus will be caused, wear gloves to protect hands from the rust.
2. As acid is used, it is corrosive and it may cause the skin to burn. Wear gloved and goggles when handling the acid. (The University of Chicago, 2010)

2.4 Risks of using acids:
As the acids that we are using are strong even in weak concentration, it is very dangerous to handle these acids. So we would need to wear gloves when handling the acid as there is a possibility that it could give an irritation to our skin or even melt it. Hence, we need to be very cautious when handling with acids. We will use a pair of tongs to remove the iron from the acid solution after experiment, as said above, it is dangerous to work with acid, especially with our bare hands. 





No comments:

Post a Comment