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Electrolysis

            
            
            
             To find the effect of time on copper deposition on the cathode during the electrolysis of copper sulphate solution.
             Introduction:-.
             I am going to test the aim in this test by setting up a beaker with two carbon rods in it. One will be a anode and one will be a cathode. These rods will have six volts flowing through them. The beaker will be half filled up with copper sulphate which is a blue liquid and will act as a electrolyte.
             To save time and effort I will used a power supply instead of using some batteries. For safety the power supply will be locked at six volts.
             I will then turn the power on and wait and see if the cathode has gained any weight by picking up pure carbon from the impure carbon on the anode.
             List of variables:-.
             Volume of copper sulphate.
             Size of copper rods.
             Length of time I leave the power on .
             Size of voltage.
             Movement of the Anode and Cathode.
             I have chosen to change the length of time I will leave the power on because it will be a safe easy way to get a fair test and will not involve me having to change the wires to suite the power.
             The other variables in the list I will try my hardest to keep the same.
             Prediction (Hypothesis) Theory:-.
             I predict that the longer you leave the anode and cathode in the copper sulphate with the electricity flowing through them the more molecules of copper would of transferred from the anode to the cathode because of the more time there was for the electrolysis to take place.
             You get a pure metal building up on the cathode because it is negatively charged and all non-metals are negatively charged so they repel. These repelled materials stick to the anode because it is positively charged. The cathode has pure metal building up on it because the positive metal is attracted to the negative cathode.
             All this relies on the positive and negative charges either repelling or attracting each other. .
             Plan of Carrying out:-.
             The equipment I used is listed below:-.


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