... you increase the voltage then the plates become more charged and the ions move around faster, so the current increases. Evaluation We were trying to make the investigation as fair as possible, this was hard because it was difficult to keep the copper sulphate solution at the same temperature throughout the experiment. Keeping the two plates, cathode and anode, in the same place and depth inside the copper sulphate solution was also difficult. Trying to make accurate measurements was also difficult. This was because the meters were not accurate; they kept on changing the readings. Therefore we had to choose the reading that appeared the most. It is quite likely that the equipment we used were recording a true measure. It was important to carry out repeat readings because of the changing temperature of the copper sulphate solution, the moving plates and the accuracy of the readings. We took enough readings to get a ...

See this essay or coursework document in full right now