• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Electrolysis Investigation

Extracts from this document...


Planning Experimental Procedure Affecting Factors - A list off all the possible factors, which would affect the resistance of a cell. * Exposed Area of Electrodes - An electrode with a larger exposed (to the solution) surface area would mean, the electrodes would not limit that rate of electrolysis. The larger the surface is, the higher the rate of electrolysis, due to there being a larger amount of copper, which can ionise. The surface are of the electrodes should be maintained the same. * Purity of Electrodes - The higher the purity of the electrodes, the lower the resistance. This is because there are n other elements which could get in the way, and therefore increase the resistance of the solution. * Voltage - In all cases, increasing the voltage will decrease the resistance. In this case, the greater the voltage, the greater charge on the electrodes and so the greater the attraction for ions. This will be investigated in our preliminary tests. * Current - Based on past knowledge, increasing the current also increases the resistance, due to the build up of heat in the wire. * Concentration of Solution - The higher the concentration of the solution, the lower the resistance will be. ...read more.


* Other common sense precautions are always necessary. Do not run in class, which may result in an accident. Tie back loose hair or dangling clothing to reduce a fire risk. Tuck stools under chars while conducting an experiment, so that nothing is in the way. Method Electrodes of the same size will be cut out with scissors from sheets of copper. The electrodes will first be rubbed with sand paper, and then swilled under a tap to remove their layer of copper oxide, and any other substances which may be present and would effect electrolysis. Once they have dried, they will be places through a piece of card, the purpose of which will be to keep them precisely 2cm apart. The current and voltage will be set at the required level for the experiment taking place. The solution will then be measured to precisely in the correct proportions, using a measuring tube, into a beaker. The crocodile clips will be played on the end of the card, which will have the electrodes bent around it. The temperature of the solution will be taken (room temperature). As soon as the electrodes are placed into the solution, the power pack will be switched on. ...read more.


If was to do this experiment again, I would like to have a calmer environment and more time in which to do the experiment. Having fresh electrodes for every experiment which had been more accurately cut would irradiate any potential problems that we had there. F new ones were not possible, then a more thorough clean process would have increased the accuracy as well. A more accurate device for keeping the electrodes in the correct places would also have been useful. Fresh chopper sulphate for every experiment would also be good, as changes would have occurred to the copper in-between the first and last experiment being done. I attempted to perfect the temperature as much as possible during the experiment, however with an analogue thermometer, that is not always possible. Using a digital thermometer, or even having the experiment in a temperature-controlled environment would have increased the accuracy f the results. For further extension work I would think that looking into the other affecting factors would be a good way forwards. Once data had been collected on all of the affecting factors, a perfect condition could be created based on the results. It would then e interesting to try electrodes of different metals, to see if electrolysis is at its most efficient with them, the same as it is with copper. ...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. The Electrolysis Of Copper Sulphate Solution Using Copper Electrodes

    Therefore, the voltage across the electrodes cannot be seen as an experimental parameter. It is, in fact, the result of one's fiddling with knob on the variable resistor. This can be tested easily by replacing the cell with a light bulb, where the resistance is constant and intensity varies with

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

    affect my experiment and I set out to control them as best I could. I made sure that I kept the constants strictly under control which I did successfully with the help of the accurate measuring instruments that I utilised.

  1. Investigation into Electrolysis

    Lesser reactivity of metals produce faster reactions. Both Zinc and Nickel are considered to be more reactive than copper in the reactivity series and will normally displace copper from solution. However, in these electrolytic cell, our qualitative observations indicate that the copper electroplating reaction is faster than the nickel or zinc electroplating reactions as there is more copper seen to be observed on the carbon cathode.

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

    E.PREDICTIONS: I will make a number of predictions about what I expect the experiment to show from his background knowledge: 1. The mass of Copper deposited will be directly proportional to the current used. This will produce a straight line graph through the origin when mass is plotted against current as shown below: 2.

  1. Investigating how the amount of copper affects the mass of the cathode

    The electrodes also produced sparks when they touched each other. Using the electrode holder prevented these problems to occur. I also decided to use a rheostat along with the ammeter because I noticed that before the current would not stay at a stable position and would keep moving continuously which was not a fair test.

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

    The fourth reading: 0.8 Amps Amount of electric charge = 0.8 x 1200 = 960 C Number of moles of electrons transferred = 960 = 0.009948186529 96,500 Number of moles of Cu = 0.009948186529 = 0.004974093264 2 Mass of copper deposited at the cathode = 0.004974093264 x 63.5 = 0.315854922 g = 0.32 g (2dp)

  1. Investigating one of the factors that affects the mass of copper deposited when copper ...

    Put on safety glasses and overall 3. Clean the copper foil pieces with emery paper on the heatproof mat, so as not to scratch the desk, until all the loose particles on the surface have gone 4. Wipe the electrodes with a tissue soaked in ammonium hydroxide solution which will get rid of any grease that is on the surface which may affect the results 5.

  2. OCR Coursework Investigation

    I will repeat each concentration three times to make sure my results are reliable. Table of Results Volume of sodium thiosulphate Volume of water Time taken for X to disappear (seconds) % Cm3 % Cm3 1 2 3 Average 60 60 40 40 68 57 65 63 70 70 30

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