Day 5 - Trial 5

22/5/13

Proceeding, we tried out the effect different metals, namely nickel, tin, zinc and copper, had on the rate of generation of electricity. The results are as shown below:

Fig 12

 Fig 13

 Fig 14

 Fig 15

Fig 16

So far, we have discovered that copper is the best metal to use.

Day 4 - Trial 4

14/5/13

This time, we are changing the NaCl solution to Ethanoic acid to see if it speeds up the rate of reaction in generating electricity.

The first test (refer to Fig 9 and Fig 10) is with 100ml of Ethanoic acid (1M), the second test (refer to Fig 11 and Fig 9) is with 100ml of Ethanoic acid (2M)

Fig 9

Fig 10

Fig 11

We had to do 2 runs for the ethanoic acid with concentration of (2M) as the value of electricity being generated was fluctuating greatly. 

From this experiment, we can conclude that ethanoic acid does increase the speed of reaction, thus we will be replacing the 100ml of sodium chloride solution with ethanoic acid of concentration (1M).

Day 3 - Trial 3

8/5/13

In order to confirm the hypothesis that lowering the volume of NaCl solution will increase the rate and amount of electricity generated, we repeated the same experiment with 100 ml of NaCl solution.

The results are as shown below:

Fig 7

Fig 8

Therefore from Fig 7 and Fig 8, we can conclude that decreasing the volume of sodium chloride solution causes the rate of electricity generated to be increased.