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

I want to find out the affect current has on copper sulphate solutions as I increase the voltage.

Extracts from this document...


Aim: I want to find out the affect current has on copper sulphate solutions as I increase the voltage. Prediction: I predict that as I increase the amount of current, the rate of extraction will speed up. In this case, if I start off low, the result will be minimum, whereas, as I steadily increase the current the result will change and maximise. As a result, due to this increase of current the rate of electrolysis will fasten, producing more and more copper in the negative cathode. Hypothesis: Electrolysis is a chemical reaction caused by the passing of an electric current through an electrolyte, which in my case is copper sulphate solution. In general, electrolysis is the decomposition of a compound into its element. To convey the electricity to the solution we use electrodes, where the end product is gathered. The element should on either the anode or the cathode; this basically depends on the charge of the product. The element with a positive charge, e.g. copper is a metal, which is attracted to the negative electrode (cathode) and this is where all the copper collects. The sulphate splits into sulphur ions; this has a negative charge (anode). ...read more.


at the beginning of the investigation. 4. Make sure all wires are working appropriately and all the other equipment, and then begin the experiment. 5. Start off with 2 volts and for each bear in mind to only leave it to a standard 5 minutes. After the 5 minutes weigh both electrodes separately and record the results into a table. 6. Repeat steps 5 again, only this time increase the current to 4 volts then 6 up until 12. Remember to record the outcomes into a table each time. Results: Here is what I am going to use to record my results in: Current Cathode (-) Anode (+) Time (mins) 0 5 2 5 4 5 6 5 8 5 10 5 12 5 Here are the actual results, which I obtained from the experiment: Current Cathode (-) Anode (+) Time (mins) 0 1.6 1.5 5 2 1.7 1.5 5 4 1.8 1.5 5 6 2.0 1.5 5 8 2.2 1.5 5 10 2.4 1.5 5 12 2.5 1.5 5 Graph: From my results I drew up a line graph stating my results, here it is: Conclusion: After carrying out this investigation, I have noticed that I have learnt many new things about electrolysis than I knew before. ...read more.


same throughout the investigation when I changed the current each time. I also made sure I had followed all rules and my method in order to obtain firm results. But I later realised that I could have dried the electrodes (anode and cathode) before weighing them, this is because water probably made the electrodes slightly heavier than it should have been. I did not have enough time to do this that is why it was left out. Finally, if I had the chance to improve my results I would have changed a few things so that my outcomes would have been extremely reliable. For example I could have got even more reliable weighing machines because the ones we used were not exact. I also could have compared 2 or 3 results and worked out the average for it, although I didn't have enough time in order to do this. Subsequently, as I have mentioned before each time I changed the current I could have changes the electrodes so that water didn't affect it as much. In general, these are the aspects of the investigation I could have improved if I did it again. I could have researched in more depth for a better conclusion and a firm investigation. What affects the rate of electrolysis? Nasir Hussain 10.8 ...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. Marked by a teacher

    An investigation to see how voltage affects The electrolysis in a copper Sulphate solution ...

    4 star(s)

    My results do follow my prediction by looking at results 1 and 3 on my graph, as there is a direct proportion between the increase in voltage and the weight.

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

    Evaluation: As can be seen through the graph (Fig. 3), there is an anomaly within the results. This means that there is one particular result that has gone outside the margin of error. This anomaly may have occurred due to several different factors.

  1. Investigate whether changing voltage will affect the rate of Electrolysis.

    Faire Test To make the experiment a faire, there were many things we factors we focused on e.g. amount of Copper Sulphate, size of the graphite rods, keeping them the same weight and length. To ensure we had these things write we measured them using the scale on our glass beakers and for he graphite rods we used a balance.

  2. Investigate whether voltage affects the rate of electrolysis?

    that I have noted its existence Analysing evidence: These graphs proves to you that as the voltage is increased so does the rate of electrolysis. The graph shows you the weight of the cathode grew noticeably as the copper was taken from the anode and attracted to it.

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

    first experiment of each current to the mass of copper deposited at the cathode for the second experiment of each current. When these two figures had been added they were divided by two to calculate the average. Evaluation I was satisfied my experiment was reasonably successful.

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

    solution for 5 minute, dry it and see if there are any changes in its weight. Weight of copper electrode before Weight of copper electrode after 1.05 1.05 There was no weight change so there are no other factors that I have not thought of which may contribute to weight change in the electrode.

  1. Electrolysis: How Does Current Affect The

    collected is the current as the concentration of the solution does not have much of an affect. The copper ions will be attracted to the cathode where it will combine with the electrons form the cathode and those which are being lost from the anode, forming a coating of copper on the graphite cathode.

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

    I think this because then any unordinary or slightly odd results can be reduced by the other sets of results making it more accurate. I think that this method was the best way to extract the information because the only way to separate the

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