... 5, 7,9,11 and 13 minuets. We then repeated this procedure twice more to obtain a good set of results. (In the second and third experiment we decided not to record the change in mass of the negative electrode because we felt there were too many things that could alter the accuracy of the result, such as water washing of newly formed copper or even newly formed copper being lost in the solution or being brushed of onto aprons accidentally, resulting in an unfair test). The results are shown in the table below. Prediction: I think that more copper should be deposited on the cathode (negative electrode -ve) so it's mass should increase. This is this is because the positive copper ions (Cu2+) are attracted to the cathode from the (anode +ve) positive electrode which should lose weight. I believe that the more time the circuit is left running the more ions will move ...

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