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

An Investigation Into The Effect Of An Electric Current On Copper Sulphate Solution

Extracts from this document...

Introduction

CHEMISTRY COURSEWORK 2002 ALICE BOAGEY 10JS - MR MARTIN AN INVESTIGATION INTO THE EFFECT OF AN ELECTRIC CURRENT ON COPPER SULPHATE SOLUTION AIM In this experiment my aim is to enforce and develop ideas about the investigation into the effect of an electrical current through copper sulphate solution. SAFETY - Electricity is dangerous - Aware of coppers sharp edges - Long hair tied back - Use of acids in experiment DIAGRAM 1) Weigh the cathode 2) Set up apparatus below 3) After a minute, remove the copper and shake off the excess copper sulphate solution. Wipe the copper with acetone and waft in the air to remove as much of the solution as possible. 4) Weigh the cathode again and record results. Repeat this procedure for the other currents. The anode does not need to be changed PREDICTION I predict that as you increase the voltage the mass of the cathode will increase. However much the cathode increases in mass the anode will increase in mass proportionately. ...read more.

Middle

THEORETICAL RESULTS TABLE Time / s Current / I Charge / c Av. Mass Deposited / g 1/2 x (IxT / 96500x64) 60 0.5 30 0.007 0.010 60 0.6 36 0.013 0.012 60 0.7 42 0.021 0.014 60 0.8 48 0.027 0.016 60 0.9 54 0.024 0.018 60 1.0 60 0.032 0.020 ACTUAL RESULTS TABLE Time / s Current / I Charge / c Av. Mass Deposited / g 1/2 x (IxT / 96500x64) 60 0.5 60 0.6 60 0.7 60 0.8 60 0.9 60 1.0 ANALYSIS By using the equation, 'Cu� - 2e� � Cu (s)' and the formula Q = I x T / 95600 we can work out how much copper should have been deposited. Once we have found out the charge (Q) we divide it by 2. This is because you have 2 moles of electrons to 1 mole of copper. This is proven by the equation ' moles = mass / R.A.M (relative atomic mass).' ...read more.

Conclusion

The results we collected were not as we had expected and in places fell quite a way from the line. I have circled the points I feel to be anomalous, and I will now explain how I perceive we found them. I think that my odd results were due to human error. It is the last two results I believe to be odd, which may explain something. I think it was the last two results that were wrong as it was towards the end of the experiment that we had less time, and therefore weren't as careful drying the copper as we could have been. To make the results more reliable I would have liked to weigh the anode each time, and compare it to the weight of the cathode to make sure if the loss was equal to the gain. I think that bigger cathodes would gain accuracy, and also making sure that the cathode and anode stayed the same distance away from each other throughout the experiment. If I could explore this experiment more thoroughly I would investigate a greater range of currents and voltages. Also different concentrations of copper sulphate solution. ...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. Investigate the factors that affect the mass of Copper deposited on the Copper Cathode ...

    and steady current and an analogue ammeter which meant I could easily read the current. I also did the experiment in the uniform conditions of a laboratory and kept all the variables the same during the experiment. However, there were certain errors and inaccuracies I encounterd and improvements I could make to my method.

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

    My results also show that the amount of copper deposited at the cathode is directly proportional to the amount of electric current passing through the electrolytic cell. This is precisely what Faraday's first law of electrolysis states. Evaluation: My experiment was a very good way of carrying out the investigation

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

    the cathode are smaller than they should be and at the anode they are larger than they should be. Strangely the worst results, those which are furthest from the average aren't those at the highest currents but the anode reading 0.85A and the cathode readings at 0.6A and 0.35A.

  2. Electrolysis - The aim of this experiment is to prove that by passing electric ...

    They are fixed in a three-dimensional ridged structure. When the solid is molten the ions can move and make their way to the electrodes. A few common ions Positive ions Positive ions Positive ions Negative ions Negative ions +1 +2 +3 -1 -2 Hydrogen, H+ Copper 2+ Aluminium, Al3+ Bromide,

  1. Electrolysis - study the effect of current upon the mass of nickel deposited at ...

    I have constructed a graph to try and help you understand the results better, which is on the previous page. My prediction was that the mass of nickel lost at the anode would be equal to the mass of nickel gained at the cathode.

  2. Investigating one of the factors that affects the mass of copper deposited when copper ...

    This is because there will be the same number of electrons being lost from the copper at the anode as there are gained at the cathode because the current is the same at both electrodes. Also all the copper ions released at the anode will float through the solution to the cathode where it becomes copper.

  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. Are Electric Cars better for the Environment?

    For many Ontario drivers, electric vehicles will offer an attractive alternative that will meet their needs and expectations. Environment There is no noise pollution which is a positive thing for the environment as for the gas cars they produce Co2and noise pollution which causes disruption to the wildlife and for residential areas.

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