Lemon Juice Lab

The purpose of this lab was in order to find which combination of two electrodes would produce the greatest voltage, under the condition that lemon juice was the electrolyte within a chemical cell. To conduct the lab, two slits were created in a lemon, which worked as a chemical cell, and an assortment of different electrodes were inserted into the lemon. Afterward, two wires were attached to each of the electrodes, where a voltmeter then gave a reading that was recorded into data.

As the experiment was being conducted, eight different combinations of electrodes were used, each of them giving differing readings. The combination that provided the highest voltage was Zn-C(Zinc and Carbon), with an average of 1.02 volts. The second highest combination was Cu-Zn(Copper and Zinc), which produced a mean of .86 volts. The third highest reading was C-Mg(Carbon and Magnesium), with a voltage of .67. The fourth highest combination belonged to Cu-Mg(Copper and Magnesium), with .52 volts. The fifth highest combination of electrodes was Zn-Mg(Zinc and Magnesium), which created .37 volts. The sixth
Based off of this hypothesis, the prediction was made that the electrodes magnesium and carbon would produce the greatest voltage. This is because of the four electrodes, magnesium and carbon were the least dense metals. However, the hypothesis and prediction were proven wrong based off of the discovered data. After reviewing the data, the highest voltage produced was from the electrodes zinc and carbon, the second and third most dense electrodes. Therefore, the density of the electrodes does not seem to have much impact on the voltage. This can be further backed up because the second highest voltage was produced from zinc and carbon, which were the densest electrodes