• 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

PHYSICS COURSEWORK. Prediction. Electrolysis is the method of using electricity to separate two solutions. This works by passing electricity through the anode, (the positive electrode,) through the solution and then back up the cathode, the negative electrode. In this investigation we will be using Sodium Chloride (commonly know as salt) to react. If the ions are positively charged then they will be attracted to the cathode, the negative electrode, and if they are negatively charged then they will be attracted to the positive electrode, the anode. When we use the Sodium Chloride then the sodium ions will be attracted to the negative electrode and the chlorine ions will be attracted to the positive electrode. If we increase the concentration then the reaction will happen faster because there are more electrons and so the chance of a reaction happening is increased. The current is the flow of Ions in the electrolyte cell, so more Ions means more current. Variables. { [image001.gif] Material of the electrode. { Concentration. { Voltage. { Temperature. ...read more.

Middle

{ Now once you have done this experiment and recorded the results. Now you will change the concentration of the sodium chloride solution by adding more or less distilled water to it. { NOTE You will need about 6 sets of different concentration results. Safety. { Wear goggles at all times. { Do not inhale the chlorine. { Do not turn the voltage up to over 6 volts. { Do not alter the power pack with wet hands. Results. Concentration. Experiment no. Current - Amps. 2 mol 1 0.67 20ml NaCl 2 0.68 0ml H[2]O 3 0.68 Average 0.68 1.75 mol 1 0.74 17.5ml NaCl 2 0.70 2.5ml H[2]O 3 0.68 Average 0.70 1.5 mol 1 2.05 15ml NaCl 2 1.98 5ml H[2]O 3 0.94 Average 1.70 1.25 mol 1 0.54 12.5ml NaCl 2 0.53 7.5ml H[2]O 3 0.52 Average 0.53 1 mol 1 0.47 10ml NaCl 2 0.45 10ml H[2]O 3 0.44 Average 0.45 0.75 mol 1 0.39 7.5 NaCl 2 0.37 12.5 H[2]O 3 0.36 Average 0.37 0.5 mol ...read more.

Conclusion

Therefore you would get a better average. In my results I did find an anomalous result, so this shows that the experiment went wrong somewhere and so the results are not perfect. I could have improved the experiment by using a larger quantity of the solution. I think the evidence was reliable enough to confirm a conclusion, because chlorine was found coming off of the anode, which means that electrolysis is a good method of separating a solution of Sodium Chloride and water. I think that to improve my experiment I would take more time to carry out the experiment and I would also use a more accurate measuring cylinder to collect more accurate results. I think that I carried out my experiment very well and I am confident that I used every safety procedure that I stated in my `Safety' section of my plan. How to extend my experiment. { I could have used a wider range of Sodium Chloride. { Use a bigger electrolysis cell so I can use a larger amount of solution. { Use a larger current. { Use different variables. ...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.  Electrolysis Coursework.

    is 0.2A and the time taken 15 minutes Ø Charge = 0.2 x (15 x 60) Ø Faradays = 180/96500 Ø Moles Copper = 0.0018652/2 Ø Mass = 0.0009326 x 64 Ø Mass = 0.0597 grams If the current is 0.2A and the time taken 20 minutes Ø Charge = 0.2 x (20 x 60)

  2. Electrolysis of Sodium Chloride - NaCl.

    and concentration are proportional; electricity is the free-flow of electrons (or charged particles) and therefore if there are an increased amount of electrons or charged particles by increasing the concentration of NaCl, then there will also be an increase in the current.

  1. OCR Coursework Investigation

    This is because it will start to react straight away. * Stop the stopwatch when the black cross has completely disappeared. * Because the first concentration will take a long time, wash the measuring cylinders and repeat the experiment in a new beaker with the second concentration.

  2. Is an increase in traffic pollution the

    * `The study also measured other pollutants, such as airborne particulates and nitrogen dioxide, but found no relationship between these pollutants and asthma.' * `Despite the increased asthma rate found for very-active children in polluted areas, asthma rates did not differ overall between the high and low-pollution areas.'

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

    * Variable Resistor also known as a rheostat, which will be used to control the amount of current that will be passed thought the experiment. * Copper Electrodes, one labelled as anode and one marked as cathode. These two electrodes will be placed into the copper sulphate solution and observed.

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

    crocodile clip 4. graphite rods 5. volumetric flask 6. pipettes 50ml/ holder 7. beakers 8. 4 wires 9. filter 10. voltmeter 11. variable voltage power pack 12. access to distilled water 13. access to NaCl 14. electric supply 15. marker pens 16. spatula Procedure First, I checked in the textbook and found that the maximum amount of salt can dissolve in 1000ml water is 360g at room temperature.

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

    While at the cathode the positive hydrogen ions are being attracted. This results in hydrogen gas being produced. Hydrogen ions + electrons � hydrogen molecules 2H (aq.) + 2e � H (g) This means that there is now a high concentration of hydroxide ions, around the cathode, and sodium ions around the anode.

  2. Electrolytic wastewater treatment apparatus

    The electrolytic oxidation apparatus of claim 12, further comprising a pretreatment chamber upstream of the electrolytic cell. 17. The electrolytic oxidation apparatus of claim 12, wherein said pretreatment chamber comprises a solids-removal chamber. 18. The electrolytic oxidation apparatus of claim 12, further comprising a post-treatment chamber downstream of the electrolytic cell.

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