Our batter consisted of 4 chemical compounds. We started by using Zn, Zn (NO3)2, Cu, and Cu(NO3)2 as a salt bridge. It created about .8 volts which wasn't enough to power our calculator. We then thought of our activity series lab. Magnesium was our first thought to increase the voltage as Mg was the most reactive metal we found. We then switches the Zn and Zn(NO3)2 with Mg and Mg(NO3)2. We were amazed by the results as the Voltmeter jumped up to 1.2 volts and kept rising until it hit around 1.38 volts where it leveled off. We tested it to see if it would work with the calculator and the calculator turned almost immediately on and started to work.
Video of the powered calculator:
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