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

Investigate the effect of the mass of a copper anode in the electrolyte of Copper Sulphate solution.

Extracts from this document...

Introduction

Adam Pattenden 10S Investigate the effect of the mass of a copper anode in the electrolyte of Copper Sulphate solution Plan In this investigation I will be trying to find out the change in mass of a copper anode during electrolysis. I will be changing certain factors to see how these affect the mass of a copper anode. Some of the factors that will affect the mass of a copper anode are: 1) Time- If this was used as a variable/factor then I predict that the longer the time, the greater the decrease in mass of the copper anode. 2) Current- if this was used then I predict that the greater the current is, the greater the decrease in mass will be. 3) Voltage- if this was used then I predict that the greater amount of voltage would mean a greater decrease in mass of the copper anode. ...read more.

Middle

Apparatus Measuring cylinder 250 ml beaker beaker 75 ml of copper sulphate (concentration= 0.25 M) Power pack Electrodes (anode = copper, cathode = zinc) Stopwatch Scales Wires Crocodile clips Propanone Diagram Method 1) I will weigh the copper anode and record its mass 2) I will then set up the apparatus as shown in diagram 3) I will turn the voltage on the power pack up to 9 4) After 2 minutes I will take out the anode and dip it in Propanone. This evaporates any of the copper sulphate on the copper so that it does not affect the mass. Then I will weigh the anode and record the results. 5) I will repeat these steps and weigh the anode after every 2 minutes up to 20 minutes and record the results. Results Time (m) Loss of mass of the anode (g) 0 0 2 0.01 4 0.01 6 0.02 8 0.03 10 0.04 12 0.05 14 0.06 16 0.07 18 0.08 20 0.09 Conclusion The results have told me that as time increases the mass of the copper anode decreases. ...read more.

Conclusion

I thought that we did take a sufficient amount of results us maybe a few more would have given us a clearer graph and a slightly better conclusion. Our range of results was good because we did from 0 minutes to 20 minutes taking a sample every 2 minutes. We could not have taken results from over 20 minutes because we did not have enough time. We did get an anomalous result; this was taken at 2 minutes. It was anomalous because the scales that we used to weigh the anode were inaccurate so I used different scales for the rest of the experiment. If I were to do this experiment again I would have repeated the whole experiment with a different anode and cathode to see if the graph was the same and that the results were similar. This would have given me harder evidence to write my conclusion with. Other factors I would like to have investigated were the concentration of the copper sulphate and also the volume of the copper sulphate. ...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. How does concentration affect the rate of electrolysis of Copper Sulphate solution?

    As there would no longer be any movement of the molecules, no energy would be transferred. This is unlikely to be a cause of the drop in the current generated at 0.9 and 1 concentrates however, as not enough time was given.

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

    It also shows that the results found by the experiment are generally a fraction smaller than what they should be. This is probably due to the copper falling off the electrodes during the time between removing the plates from the Copper(II)

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

    sulphate solution, the power was switched on and the desired current set using the voltage and variable resistor. The experiment was left for twenty minutes and then carefully removed and cleaned using the same method as in the investigation. The cathode was then reweighed and a mass of 1.37g was recorded.

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

    Therefore the room temperature may have changed as I did not keep any record of it. Heat would have sped up the movement of the molecules which might increase the rate of reaction but it would also increase the amount of resistance in the experiment.

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

    Thus they become copper atoms. This is shown by the equation: Cu�+ + 2e- � Cu This shows that two electrons are needed to discharge each copper ion. In addition to the copper in the copper sulphate solution being decomposed, positive copper ions from the positive anode are also being attracted to the negative cathode.

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

    At the cathode the copper ions gain two electrons to become copper atoms, which is called a reduction reaction. The copper atoms will then cling to the pure copper cathode so it gets thicker. I don't think that the colour of the solution will change as the copper ions become

  1. Investigating the factors that affect the amount of copper deposited during the electrolysis of ...

    In a) The larger the current, the larger the amount of copper deposited. This is because by increasing the current, more electrons are passed into the cell and so should increase the amount of copper deposited at the cathode. The rate of Cu2+ combining with e- will speed up as there are more electrons readily accessible to form copper atoms.

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

    The rate of speed at which the positive ions collide with the cathode should also increase to allow more copper to be formed. HYPOTHESIS: I will now give evidence to support my theory. If a pair of electrodes are placed into a solution of an electrolyte or in a solution

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