• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12

Electrolysis of Copper Sulphate

Extracts from this document...


Electrolysis of Copper Sulphate By Ali Hlaiyil Introduction/Initial Research: Electrolysis is the production of useful elements as compounds by using electrical energy and converting it into chemical energy. The reaction takes place when electricity is passed through a circuit, which at one point is split by 2 electrodes, which are dipped into a solution called the electrolyte. The electrodes must be made of a conductive metal, that wither needs to be plated, or is needed in the production of Hydrogen, or other gases. The electrolyte which is a compound solution made up of many elements, is split up into individual elements or even small compounds when the electricity is turned on and passed through the electrodes and into the water. When this happens, the positive ions move towards the negative anode, and the negative ions in the mixture move to the now positive cathode. At the cathode an element is collected, and usual plates the electrode, the thickness of the plating being determined by the power of the current and the length of time that the electrolysis reaction goes on for. ...read more.


Faraday's First Law of electrolysis states that: "The mass of any element deposited during electrolysis is directly proportional to the number of coulombs of electricity passed (the current in our case)." Faraday's Second Law of electrolysis states that: "The mass of an element deposited by one faraday of electricity is equal to the atomic mass in grams of the element divided by the number of electrons required to discharge one ion of the element." Apparatus: 1. D.C Power Supply 2. Ammeter 3. Copper Electrodes 4. Circuit Wire 5. Crocodile Clips 6. Beaker 7. Copper Sulphate Electrolyte 8. Top pan balance Variables: Independent: Time of current flowing through circuit Dependant: Mass of electrodes Control: Current Initial Size/Mass of electrodes Amount of electrolyte used Temperature Method: Measurements used: 0min, 5min, 10min, 15min, 20min, and 25min. Readings used: weight of electrodes Current: 5v Test Repeated: 2 readings per strip (2 strips were used). The electrolyte (50cm3 of Copper Sulphate Solution) was poured into a small beaker. The 2 copper electrodes were thoroughly cleaned. The electrodes were weighed, their masses recorded and then they were placed into the beaker containing the electrolyte. ...read more.


To overcome this problem, a stock solution of Copper Sulphate should have been made so as the concentration remained the same at all times. The same electrodes and equipment should have been used throughout. Also, when weighing the electrodes, the same electrical top-pan balance should have been used as there may have been slight differences between the two balances. This is what could explain any anomalous results. In future experiments I would like to investigate and go further into electrolysis, and look at and test other factors including the current, temperature, concentration, quantities and sizes, and distances between electrodes that affect the rate of electrolysis. An interesting test would be the test for different currents, and for different temperatures, as these are fairly simple and can be conducted easily in my school laboratory. This would allow me to investigate further into electrolysis, and be able to identify the proportions and similarities that the rate of electrolysis depends on. I found the investigation to be very interesting, and I am looking forward to investigating the other variables and factors for the experiment. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Changing Materials - The Earth and its Atmosphere section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Changing Materials - The Earth and its Atmosphere essays

  1. ElectrolysisThe experiment carried out aimed to monitor the quantity of Copper (Cu) metal deposited ...

    Ø Moles of Electrons or Faradays = Charge (C) / 96500 Ø Moles of Copper = Moles of electrons or Faradays / ratio=2 Ø Mass = moles x RAM If the Current is 0.2A and the time taken 5 minutes Ø Charge = 0.2 x (5x60) Ø Faradays = 60/96500 Ø Moles of Copper = 0.0006217/2 Ø Mass =

  2. How does concentration affect the rate of electrolysis of Copper Sulphate solution?

    This was to save cleaning time during the experiment. - The error range of the thermometer was +/- 0.5�C. - The error range of the measurement for the concentration was +/-1ml. - The circuit box was set up on 9 volts.

  1. The Electrolysis Of Copper Sulphate Solution Using Copper Electrodes

    The results would have been better if the experiment was left on for longer, say, 5 minutes, to compensate for the error. Also, it would have been more sensible if I had not left the electrodes in the Copper Sulphate solution over half-term.

  2. Investigate the factors that affect the mass of Copper deposited on the Copper Cathode ...

    The variable resistor maintains a low and steady current. The power pack was then turned on for 20 minutes, the time was measured using a stop clock. When 20 minutes is passed the copper cathode is carefully removed from the copper sulphate solution. The cathode should (according to my prediction)

  1. The Electrolysis Of Copper (ii) Sulphate Solution Using Copper Electrodes

    The mass of copper deposited at the cathode will be the same as the mass of copper lost from the anode because it is true that gain in mass at the cathode is equal to the loss in mass at the anode (all the cations of Copper which pass into the electrolyte mixture will discharge at the cathode).

  2. The aim of this experiment is to investigate the factors affecting Copper Plating and ...

    pour 75cm3 of the Copper Sulphate solution into a small beaker * Weigh the two Copper Electrodes, record their masses and place into the beaker containing the Copper Sulphate solution * The electrodes are then connected to the power pack and ammeter.

  1. What Effects the Reaction in the Electrolysis of Copper Sulphate.

    I will also set up my experiment away from any hazards to stop it from getting knocked over. I will keep my working area as clear as possible so there is nothing on my desk except the apparatus needed. I will wear goggles in order to protect my eyes.

  2. Investigation to show how the amount of electric current affects the amount of copper ...

    Propanone is also extremely flammable so I must make sure that no potential fire comes near it. As well as ensuring that my experiment is safe, I must also be cautious about other experiments going on around me and advise others if they are not taking necessary safety precautions.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work