Electrolysis
The investigation I am conducting is to find out how much copper is attracted to the cathode from passing electricity through copper sulphate solution through an experiment called Electrolysis. When the power pack is turned on electrons pass through the circuit and through the electrodes at the cathode, because the copper sulphate solution becomes ionized; that is, their molecules become dissociated into positively and negatively charged components, which have the property of conducting an electric current, the positively ions in the solution move toward the negative electrode and the negative ions towards the positive. When reaching the electrodes, the ions may gain or lose electrons turning them into neutral atoms or molecules. The positive copper ions and Hydrogen ions will be attracted toward the negative electrode (cathode), the copper ions discharge to form metallic copper whereas the Hydrogen ions will stay in the solution as the copper ions release their electrons more readily than the Hydrogen ions. The Sulphate and Hydroxyl ions are attracted to the positive electrode (anode) but as the Hydroxyl ions release their electrons more readily than the Sulphate ions the Hydroxyl wil
I also said that If the amount of voltage doubles then so will the weight increase but this did not happen, as I would have expected it to. The Sulphate and Hydroxyl ions are attracted to the positive electrode (anode) but as the Hydroxyl ions release their electrons more readily than the Sulphate ions the Hydroxyl will get there first. My prediction was partly correct, as I said the higher the currentvoltage the more the carbon rod will increase in weight, which is shown in my results. The results show that as the voltage is increased this will increase the amount of electrons in the circuit which will attract more positive copper ions at the cathode therefore leaving more metallic copper on the carbon rod, thus causing it to weigh more. Once the eight minutes was up I again measured the same carbon rod and recorded the weight increase from before and after the experiment. I then measured the carbon rod that was to be attached directly to the power pack. * I could have made sure that the amount of copper sulphate solution was at the same level throughout all of my experiments. We could have done more repeat results instead of just two. Improvements for Reliability* I could have made sure that the amount of volts passing through the circuit were less than 0.
Common topics in this essay:
Weight Carbon,
Copper Chloride,
Hydrogen Aim,
Voltmeter Prediction,
Sulphate Hydroxyl,
Investigation Introduction,
Improvements Reliability,
copper sulphate,
sulphate solution,
copper sulphate solution,
carbon rods,
power pack,
Voltage Precise,
carbon rod,
copper ions,
amount volts,
amount copper,
weight carbon,
hydrogen ions,
weight carbon rod,
release electrons readily,
copper chloride solution,
ions release electrons,
Electrolysis Copper,
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