Graph of Results:
Investigation 2:
Aim: To use the metals that gave off the highest voltage from investigation 1, and see if they can give off voltage whilst running through different types of fruit.
What I found: I found that the fruit that gave off the highest voltage was an orange,- and highly acidic, which led me onto investigation 3, and the question- do acidic fruits give off a higher voltage?
Table of Results:
Graph of Results:
Investigation 3:
Aim: To find out what happens to the voltage of the metals, when placed into a beaker containing citric acid, and then what happens when the level of citric acid is increased.
What I found: I found that the level of citric acid fluctuated between each of a tenth of a gram that was added to the acid. But overall, I found that the higher the level of citric acid in the water, the higher the voltage.
Table of Results:
Graph of Results:
Conclusion:
I have found that the combination of Magnesium and Copper was very strange, because Magnesium is a strong- more reactive metal, and Copper is weak- less reactive metal, I didn’t think that it would prove to be the best combination. I would have thought that Iron and Magnesium would have been a better combination, and provide more voltage. I also found that less acidic fruits provide less voltage, in comparison to more acidic fruits. I predicted this would happen. I also found that the higher the level of citric acid added to a beaker of water, the higher the voltage provided.
To get the most amount of voltage, I have found that you should use; Magnesium and Copper, Acidic Fruits, and lots of Citric Acid.
By. Sarah-Jane Morris 9B/LB
