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

What is electrolysis?

Extracts from this document...

Introduction

ELECTROLYSIS What is electrolysis? Electrolysis is a method of extracting metals from metal compound solutions or molten metal compounds. It is done by passing an electric current through a solution/ compound to break it up. The ions travel to the electrodes where electrons are gained or lost to make atoms. All metals above carbon e.g. aluminium, calcium, and potassium, need to be extracted from ores using electrolysis. The same method can be used in electroplating. ...read more.

Middle

What is happening? In the experiment I am doing I will use copper sulphate solution- Cu2+SO42- The Anode is positively charged so attracts the SO42- and takes excess electrons. It also attracts OH-. 4OH- makes O2+2H2O+4e- (4 negative electrons). The Anode is made of copper so the copper looses electrons and becomes positively charged. These copper ions then move to the cathode. The Cathode is negatively charged so attracts copper ions. The copper ions gain electrons and become copper atoms. ...read more.

Conclusion

Preliminary Experiment I am changing the time that the electrodes are in the solution. I will test to see what voltage to use and what times are sensible. I have decided to use 4V from 1 to 5 minutes. Prediction I predict that Results Here are the results I gathered: Time (mins) Anode mass (g) Cathode mass (g) Anode loss (g) Cathode Gain (g) 1 0.29 0.32 0 0 1.5 0.31 0.30 0 1 2 0.33 0.29 2 1 2.5 0.37 0.32 2 1 3 0.32 0.30 3 2 3.5 0.26 0.34 4 3 4 0.33 0.36 4 3 4.5 0.28 0.26 5 5 5 0.30 0.28 5 6 ...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. Investigating the rate of electrolysis.

    that react in the solution therefore they can collide more frequently which means they will react more frequently, speeding up the reaction. These same rules would also apply if you increased the quantity of the solution. Below is a diagram of the molecules of the solutions in their regular state (left)

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

    solution, and this may have slightly affected the forming of copper atoms at the cathode. And finally another inaccuracy is that on one occasion, the crocodile clip holder slid into the solution, so the crocodile clip was exposed to the electrolyte.

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

    Similarly, decreasing the amount of electric current will decrease the amount of copper deposited at the cathode and decrease the amount of copper released from the anode. The scientific explanation for my results is that when an electric supply is connected to the electrolytic cell, electrons flow from the anode to the battery and from the battery to the cathode.

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