For my GCSE Chemistry assessment I will be investigating the
electrolysis of copper sulphate solution with the copper (ii) plates.
My intention for this observation is to find out how the current has
an effect on the mass of copper deposited in the electrolysis of
copper sulphate and copper (ii) plates.
In this investigation I will make sure that everything is as safe as
possible and that there are no chances of accidents occurring.
(1) I will wear safety glasses and a lab coat to avoid any danger.
(2) I will tie my hair back, which will prevent any accidents from
(3) I will keep the area around me clear to prevent any accidents from
(4) Benches should be tucked under the table so that nobody trips
(5) As copper sulphate indicates the symbol, which means toxic, I will
be careful that it is kept away from my skin and I am not able to
smell it. The reason for this is that it can cause death.
(6) Copper sulphate will be placed in the tray at all times so that if
it spills it will only spill in the tray.
(7) I will not keep the power on more than 10 minutes, as keeping the
power on for too long can change the resistance of the wire.
(8) As the copper sulphate is dangerous I will wash my hands after
The apparatus that I require in this investigation is:
(1) Measuring cylinder- This will be used to measure 150ml of the
copper sulphate solution
(2) Ammeter- This will be used to se how much current is flowing
through the circuit
(3) Stop watch- This will be used to time how long the practical will
be on for.
... middle of paper ...
I know that this is a straight line graph and that the gradient is
positive by looking at the graph. I can now interpret from this graph
that this investigation matches the law of Michel Faraday, the first
law that I mentioned in the scientific background knowledge is:
The quantity of electricity passed is proportional to the amount of
substance discharged at an electrode.
This law infant matches my results that I have gained, I can now
confidently say that the results that I obtained were accurate. As I
increased the voltage and the current there was a larger mass in the
cathode. Therefore this proves that my prediction which I made is
As the current increases the amount of copper deposited will also
In this electrolysis both the oxidation and reduction reactions have
been used, the oxidation in the anode and the reduction in the
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