• 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...

Introduction

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.

Middle

* 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.

Conclusion

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

    However, the resistance across the electrodes is constant (equals the total resistance of the solution, the electrodes and the crocdile clips), by the same equation, when the current is changed, the voltage must change. Current must be the same everywhere in a series circuit.

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

    The fact that the graphs don't show this doesn't contradict this statement or disprove his second prediction; in fact these differences can be very easily explained in terms of experimental error.

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

    Therefore, positive copper ions are released from the anode into the copper sulphate solution. In effect, the copper anode is constantly supplying the electrolyte with copper which is then in turn discharged and deposited at the cathode. This means that electrolysis will not cease until the copper anode immersed in

  2. Investigation into Electrolysis

    Further analysis of the precipitates produced by part b would have provided us with further information as to the reactions taking place and thus information on whether more than one redox reaction can take place on the electrode. Lesser reactivity of metals produce faster reactions.

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

    Both electrodes are immersed to a depth of 3cm in 1.0 mole dm Copper sulphate solution The Variable resistor is adjusted to give the desired current which could be read by looking at the ammeter. The variable resistor maintains a low and steady current.

  2. Human Impact On the Environment

    keep the heat as there is no sun to provide heat and light. Without the greenhouse effect many animals, plants and people will not be able to survive. Most scientists believe that main cause of global warming is the green house gasses that are produced.

  1. Factors affecting mass of copper transferred in Electrolysis of aqueous copper sulphate

    Time (mins) Charge (coulombs) mass of copper gained (g) 0 0 0.00 2 60 0.02 4 120 0.04 6 180 0.06 8 240 0.08 10 300 0.10 By looking on the predicted graph results I also predict that the results of mass gained will be proportional to the current as stated in Faraday's law.

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

    Every ion only needs two electrons to form an atom which means the electrons can be given out to more ions therefore forming more copper and therefore increasing the mass of the cathode. The anode will lose more mass if the current is increased because there are more electrons being

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