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

What Affects The Rate of Electrolysis Of Copper Chloride Solution?

Extracts from this document...


What Affects The Rate of Electrolysis Of Copper Chloride Solution? Introduction We are going to find out what things affect the rate of Electrolysis and to find this out we will use Copper chloride salt dissolved in water to form a solution. The salt is dissolved in water because chemical compounds when in a molten state or when dissolved in water exist in the form of ions that are capable of movement, meaning their molecules become dissociated into positively and negatively charged components, which have the property of conducting an electric current. A compound that conducts when molten or in solution is called an electrolyte. When some substances dissolve they change slightly, their atoms are no longer neutral, neither positive nor negative. The negative atoms lose their electrons so the atoms become positive. These particles are no longer known as atoms but ions. The positive ions are called anode. The negative ions are called cathode. These electrons only dissolve in water. Because they have enough room to move this then lets the reaction take place. Equation CuCl2 Cu+2 + 2Cl-1 If a pair of electrodes is placed in a solution and a source of direct current is connected between them, the positive ions in the solution move towards the negative electrode (cathode), and the negative ions move towards the positive electrode (anode). ...read more.


* Copper chloride solution - for doing the electrolysis experiment. What results I will collect: I will fill the beaker with copper chloride solution and set out the experiment while my partner will go and record the weight of the electrode. Then we will do the experiment and wait for 3 minutes and when the reaction is finished after 3 minutes we will go and weigh the electrode. Afterwards we will record the result. To find out how much copper is made we will subtract the weight of the electrode before the experiment from the weight of the electrode after reaction. I will alter the current every time I do the experiment because then not also can I find out how much copper is formed but also how much because I think that if there is less current, then there will be less copper formed and I want to prove my hypothesis and so if I vary the current I will found out and then prove my predictions. I will keep the same amount of solution and the same amount of concentration because if I did not it will not be a fair trial. This is because if I don't keep the same amount then the one with more solution will form more copper and the one with less solution that one will form less copper. ...read more.


We will use 50 ml of copper chloride solution on every trial experiment we do. Results A table to show the results collected. Amount of current Weight of electrode before reaction Weight of electrode after reaction Amount of copper made Averages 12 volts 12 volts 2.98g 3.05g 3.06g 3.10g 0.06g 0.05g 0.065g 9 volts 9 volts 3.05g 3.06g 3.07g 3.09g 0.02g 0.03g 0.25g 6 volts 6 volts 3.04g 3.04g 3.05g 3.06g 0.01g 0.02g 0.015g Conclusion I have learnt that the more electrons flowing the more chance you have of seeing a better reaction taking place, the more current flowing the quicker and better the reaction and the more concentrated the solution the more electrons will be in the beaker instead of water and the better reaction you will get. If we have a high current then there was more copper formed and more chlorine gas let off in 30 seconds. If we have a low current then there is less copper formed and less chlorine gas let off. Here is a diagram of what actually happened Evaluation: My results were reliable and I had enough results to reach to a conclusion. I had some unexpected results on the weight of the electrode before the reaction because we measured the same electrode and there weight was different. If I had more time then I would have changed the solution to a less diluted one. Overall I carried out a fair trial. Davinder Singh Poonia ...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. Peer reviewed

    To find out how current affects the rate of electrolysis

    3 star(s)

    This is a straightforward relationship. If you double the charge, then the rate of electrolysis will double. This is because electrolysis involves ions taking electrons from the cathode and depositing electrons at the anode. Charge is the number of electrons.

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

    My method was a good way of carrying out the experiment as I achieved a good set of results and my method was easy and simple to carry out. I used accurate equipment such as an electronic balance, which gave reasonably accurate readings, a variable resistor which ensured a low

  1. Electrolysis of Copper Chloride

    Temperature i.e. the temperature inside the electrolytic cell 5. Quantity i.e. the amount of electrolyte used The independent variable, time, was chosen between the five variables due to its simple nature of measuring and recording, whilst as the experiment progresses the other variables will be maintained at a constant level to ensure a fair test.

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

    Conclusion: From my experiment I have found out that increasing the amount of electric currents flowing through the copper sulphate solution electrolyte will increase the amount of copper deposited at the cathode and increase the amount of copper released from the anode.

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

    It can also be seen clearly from the graphs that in general the mass of Copper gained at the cathode is smaller than the mass of Copper lost from the anode. In theory these should be equal because during all electrolyses the number of electrons lost at the anode must equal the number of electrons gained at the cathode.

  2. Investigate the effect of the amount of sodium chloride, i.e. concentration gradient, in the ...

    This is because the electrolysis of an aqueous solution of sodium chloride using graphite electrodes will cause transfer of sodium from anode to cathode and ionization of the sodium chloride is ionised in the aqueous solution. The higher the concentration, the more delocalised ions, the quicker they can move around, which results a higher current.

  1. Investigate how the rate of electrolysis is affected when changing the current in the ...

    each electrode is proportional to the quantity of electricity passed through the electrolyte. I am going to do two experiments, varying two factors to find what effects the rate of electrolysis the most. For the experiments I will use Copper Sulphate solution as the electrolyte and copper electrodes.

  2. Investigate the factors that effect the current flowing during the electrolysis of an aqueous ...

    * I will then dissolve the 5 grams of sodium chloride into the beaker containing water. I will do this by stirring the solution with a glass rod. * I will balance the electrode holder by using two splints, on the rim of the beaker * I will measure each

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