• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6

# Does Current Affect The Amount Of Copper Transferred During Electrolysis With Copper Electrodes In A Copper Sulphate Solution?

Extracts from this document...

Introduction

Does Current Affect The Amount Of Copper Transferred During Electrolysis With Copper Electrodes In A Copper Sulphate Solution? By Will McEwan Aim To investigate how the amount of copper transferred during electrolysis is influenced by the current. Prediction I predict that with a greater current, more copper will be transferred. They will be directly proportional. Hypothesis The Copper atoms are using the electrolyte (copper sulphate) to transfer themselves between the two electrodes. If the current increase then the amount of copper atoms crossing between the electrodes also increases, thus increasing mass of copper transferred. Apparatus Ammeter Beaker Cell Pack Stopwatch Copper Sulphate Solution Copper Electrodes Crocodile Clips Scales Propanone Iron Wool Variable Resistor Wires Diagram Method * Take the copper electrodes and clean them with iron wool (to remove impurities on surface and aid electrolysis), taking care not to get splinters of iron into fingers. ...read more.

Middle

The time that each current is run for should also be kept constant. Preliminary Work Using background knowledge that Q=IT: Q is Charge in Coulombs I is Current in Amperes T is Time in Seconds And the relative mass of Copper is 64. With this information it became possible to predict what a perfect set of results should be: Preliminary Prediction I (amps) T (Mins) T (secs) Q (Coulombs) F (Faradays) Moles Cu Mass Cu (g) 0.50 5.00 300.00 150.00 0.001563 0.000781 0.050000 0.45 5.00 300.00 135.00 0.001406 0.000703 0.045000 0.40 5.00 300.00 120.00 0.001250 0.000625 0.040000 0.35 5.00 300.00 105.00 0.001094 0.000547 0.035000 0.30 5.00 300.00 90.00 0.000938 0.000469 0.030000 0.25 5.00 300.00 75.00 0.000781 0.000391 0.025000 0.20 5.00 300.00 60.00 0.000625 0.000313 0.020000 0.15 5.00 300.00 45.00 0.000469 0.000234 0.015000 0.10 5.00 300.00 30.00 0.000313 0.000156 0.010000 0.05 5.00 300.00 15.00 0.000156 0.000078 0.005000 Graph Of Preliminary Prediction Of Copper Transferred Results Due to time constraints my readings had to taken in two parts. ...read more.

Conclusion

However, my preliminary results fully support it. In theory my prediction is right, but in practice it is near impossible to give supporting evidence. Evaluation My experiment was performed under very basic conditions. From the preliminary work I can see that it is not my prediction that is wrong. I believe that given perfect lab conditions and enough time I could prove my prediction right. In my experiment I lost a lot of copper in the electrolyte. I could improve my experiment by filtering the electrolyte each time and weighing the filtrate with the paddles this would prevent loss of mass. When drying the paddles I sometimes oxidised the copper and this added mass. In future the paddles could be dried by different means such as a hairdryer on a very low heat. It took about 30 seconds to set the right current, as this is 10% of the total time this could have an effect on the amount of copper that was transferred. To overcome this problem, a digital resistor could be used that automatically sets the amount of current. ...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

# Related GCSE Changing Materials - The Earth and its Atmosphere essays

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

- Apart from the change of electrodes noted, the only other change of equipment within the experiment was the change of wires. Other than that, the same equipment was used throughout the experiment. Conclusion: Through the results, (primarily the graph Fig.

2. ## The electrolysis of copper sulphate solution and copper electrodes

Cu - 2e- Cu2+ : this is a oxidation reaction The time that you let the electric current pass through the circuit could effect on how much copper is deposited at the cathode. The longer you let the circuit run for the more copper will be deposited.

1. ## An experiment to show how electroplating using copper electrodes.

The method and the equation I have mentioned early on in background knowledge can calculate the actual mass change. The prediction I have predicted has come out to be exactly the same as the experiments, which is that the change in mass will be proportional to the change in current.

2. ## The Electrolysis Of Copper Sulphate Solution Using Copper Electrodes

In the electrolyte these charged particles are mobile ions. At the electrodes electrons are given to the cat ions cathode (-), and are released at the anode (+), so the current flows. Therefore species are gaining electrons at the cathode, and so being oxidised, whilst electrons are taken away at the cathode (reduction).

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

Sulphate solution using copper electrodes knowing the RMM of Copper to be 64: Q = I x t = Y x 5 x 60 = 300Y From ionic half equation; Cu(s) - 2electrons --> Cu (aq) 193000C 64g So; 193000C deposits 64g 300Y Coulombs deposits 64 x 300Y / 193000 =19200Y / 193000 = Y x 19200 / 193000 D.

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

copper sulphate solution, two copper strips (electrodes), an ammeter, a rheostat, a stop-watch, a power-pack, crocodile clips, distilled water, propanone, a hairdryer and an electronic weighing machine. The apparatus will be set up as shown below: Before connecting the copper electrodes to the circuit, I will weigh them both with

1. ## Investigating the factors that affect the amount of copper deposited during the electrolysis of ...

The further apart the electrodes are, the less copper will be deposited on the cathode. If the electrodes are closer together, the ions have less distance to move and so the copper can be deposited more quickly. This diagram demonstrates what is said below Copper (II)

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

The experiment will also be easy to set up and to achieve accurate results. Qualitative prediction In this investigation I am investigating the electrolysis of Copper (11) sulphate solution using copper electrodes. When this experiment is undertaken I predict that the anode will dissolve into the copper (11)

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