2. Methods

Our Experimental Setup:

Fig. 2 Photovoltaic Cell

Steps:

1.    Set up the experiment as shown in the diagram above.

 (DO NOT PUT THE METAL IN FIRST)

2.    Take copper, zinc, aluminium and brass. Sand both surfaces of each piece of metal/make sure all metals measure to be the same size. 

3.    Ensure that the concentration of sulfate is the same in both beakers.

4.    Use the crocodile clip and connect both metals together.

5.    Connect a multimeter in the centre of both connected metals.

6.    Put the salt bridge between the beakers.

7.    Put the metals into the beakers.

8.   Wait for the metals dissolve.

9.   Check and list the amount of voltage produced for each metal

10. List down the amount of electricity produced by all metals.

11. Repeat the experiment 2 times.

12. Repeat the experiment with a different metal but keep copper as a control.

2.5 Data Analysis

Steps:

1. Create a table with 3 columns, type of metal, results (1st try), results (2nd try).
2. Check and list the amount of voltage produced for each metal and place it in the table
3. Repeat the experiment with the same metal twice.
4. Repeat the experiment with the different metal twice
5. Tabulate the data according to the data tables and find the voltage of each pair of metals
6. Plot a bar chart amount of voltage in each pairing of the metals

From the chart, we can find out which pair of metal have the most voltage from the redox reaction of a voltaic cell.

Metals	Results (1st Try)	Results (2nd Try)
Copper + Zinc
Copper + Aluminium
Copper + Magnesium
Copper + Nickel

Equipment List:

Equipment	Quantity
7 cm by 2 cm of copper	5
7 cm by 2 cm of zinc	2
7 cm by 2 cm of aluminium	2
1 M of copper sulfate solution [(Cu2+SO4)]	5
1 M of aluminium sulphate solution [Al2(SO4)3]	2
1 M of zinc sulphate solution [ZnSO4]	2
Beaker	2
Crocodile Clip Wire	1
10g Salt (Sodium Chloride)	1
10cm String	5
Vernier Voltage Probe	1
Vernier Computer Interface	1

Risk	Assessment	Management
The sulfate and metals used are poisonous. If there is contact with skin, irritation or infection may occur.	High	Students must wear gloves when carrying out the experiment. Students must not eat or drink during the experiment. Students must wash their hands before and after experimentation.
A chance that the breaker can break due to toppling	Medium	Paste a double sided table on the table to secure the beaker
There is electricity in the experiment, there is a chance of a short circuit, causing a fire.	High	Keep a close eye on the setup, have a sand bucket close to the experiment in case it catches fire.
Metals or metal shavings might be ingested accidentally	High	Food and drinks must not be consumed in the lab and shavings to be disposed of.
Legend	Low	Unlikely and no severe harm
	Medium	Likely but not severe OR Unlikely but severe
	High	Likely and Severe harm

Table 1: Risk Assessment and Management Steps for the experiment