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Resistance of Lemon Juice

Resistance of Lemon Juice. Marek Hajek. Objective and Hypothesis. The objective of this experiment is to examine the effects of temperature changes on the resistance of lemon juice.

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Resistance of Lemon Juice

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  1. Resistance of Lemon Juice Marek Hajek

  2. Objective and Hypothesis • The objective of this experiment is to examine the effects of temperature changes on the resistance of lemon juice. • My hypothesis is, that the resistance will lower with the increase in temperature due to the fact that temperature is measurement of average kinetic energy.

  3. Lemon Battery • The procedure is very easy. The original battery looks like the one to the right, however; for the best results and easiest manipulation it is advised to use lemon juice. We still use a cathode of copper and anode of zinc but we do so in a juice.

  4. What actually happens? • In the case of the zinc-copper battery, at the anode, zinc, is oxidized: • On the other hand, at the cathode, copper, hydrogen is reduced:

  5. Suggestion for next time? • I would highly suggest using magnesium instead of zinc. For my own experience, the voltage with magnesium increased from 1.1V to 1.6V.

  6. Let us look at the Graph Since there are apparent mistakes in the measurements, we employ the line of best fit.

  7. Conclusion • In conclusion, I found out that the resistance decreases when the lemon juice is heated as I already said in the hypothesis. Nevertheless, in the graph, there is an exponential function suggesting that the relationships are not in first degree, most likely degree of x. There are many possible errors, the imprecision of the measuring devices, human error, and state of the chemical reaction. All of these greatly contributed to the uncertainty of my experiment.

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