• 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

# Electrolysis COursework

Extracts from this document...

Introduction

Electrolysis Coursework Aim: To investigate whether increasing the voltage through a copper sulphate solution increases the amount of copper extracted. Introduction: Electrolysis is the process in which an electric current flowing through a water solution of a chemical breaks that compound up into its component parts. I will be investigating how changing the voltage through an ionic copper sulphate solution, increases the amount of copper extracted on to the anode. I will do this by varying the voltage to calculate the effects of this factor on the original mass and solution mass after. From this I will calculate the difference, so it is easy to compare and evaluate. Apparatus: - Power Supply Unit (PSU) - Top Pan Balance - Wires - Electrodes - Anode - Electrode holder - 20cm� CuSO4 solution - Small Beaker - Measuring Cylinder Prediction: I predict that the higher the voltage the higher the amount of copper on the cathode. In the same way, I also predict that the lower the voltage the lower the amount of copper on the cathode. ...read more.

Middle

These relate to the quantity of electricity which passes through an electrolyte to the amount of the substances formed. Faraday's first law states that the first amount of the substance is proportional to the quantity of electricity. Faraday's second law states that the amount of the substance deposited is inversely proportional to the size of the charge on its ion. Fair Testing: To keep the experiment fair, I will keep all the factors that I am not investigating constant. These will be: the same amount of Copper Sulphate solution every time, the same concentration each run and the same time interval for electrolysis to occur. I will use the same method for every change in voltage Method: 1. I plan to fill a beaker to 20ml3 with Copper Sulphate solution. This will be the set amount every time. 2. Then weigh the carbon rod which will be the cathode and record the mass. Set up the apparatus as shown on the diagram below. 3. The concentration of the solution will be the set amount every time (0.5 molars). ...read more.

Conclusion

The graph and my results support my prediction that as the voltage increased, a larger amount of copper will be extracted. Evaluation: On the whole, I think that this investigation went quite well and I carried it out well in the conditions provided. My range of four results was adequate to plot a graph which supports my hypothesis, giving enough evidence to form a conclusion. There were not any anomalies showing that the experiment was accurate and reliable. I chose this method of setting up my circuit because it is a standard and also it is a standard and also it is the simplest and easiest to set up. I used carbon electrodes. There were some sources of errors such as weighing the cathode before and after. This is because they were measured on the top pan balance, which is very sensitive, and could sense movement of air particles from a fair distance away, hence the mass obtained could never be 100% accurate. Other possibilities that I could explore further are: trying different solutions other than copper sulphate and trying different concentrations. Overall I think I carried out the experiment well and was able to get valid results. ?? ?? ?? ?? Tejpal Vig Science Coursework Ms Virdee ...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 Classifying Materials 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 Classifying Materials essays

1. ## I have done four different investigations, which is Hooks law, pH four unknown liquids, ...

Having done the experiment, I plotted my graph the average extension against mass. To improve the accuracy of the result first it is important to set up the instrument precisely, although you have to know all spring are not the same, same spring are pre tensioned, this means that they coil up tight when not loaded.

2. ## Investigating the Factors Affecting the Temperature Change Between Zinc and Copper Sulphate

Temperature of CuSO4 before reaction (oC) Temperature of ZnSO4 after reaction (oC) Temperature Difference (oC) 0.5 20.0 26.5 6.5 0.7 23.5 30.3 6.8 0.9 20.5 30.1 9.6 1.1 23.0 33.2 10.2 1.3 24.4 35.2 10.8 1.5 23.5 34.7 11.2

1. ## Periodic table

Not all genes are turned on at the same time - some switched on later and can lead to late onset disorders such as Huntington's disease. Haemophilia - a mutation in one of the clotting factor genes. It is a sex linked disease which affects males of all ethnic backgrounds.

2. ## Investigate a factor that effects the change in temperature between iron and copper sulphate.

I carried out my preliminary investigation in 10ml of copper sulphate one molar solution. I have decided to record the temperature every minute for four minutes, as I believe this is enough time to see the full rise in temperature for the mass of iron.

1. ## Our experiment consisted of two samples of water containing unknown substances, and our objective ...

The middle of the flame is the hottest part of the flame, so that's where we held the substance. The energy from the flame causes electrons to move onto the next shell of energy (which is around the nucleus of the atom)

2. ## An Investigation Into How the Mass of Zinc Effects the Heat Change In the ...

may have arisen from: * Heat being lost from the polystyrene cup and the beaker, or by escaping through the hole in the lid, which was provided for the thermometer. * The amount of copper sulphate solution not being measured out exactly.

1. ## formula for copper sulphate

From this, I can safely say that the titre volume of 23.80 cm3 may have been the slight anomalous result. For experiment 1, I derived: 2.40g > 1.60g > 1.59g > 1.58g > 1.57g>1.57g. A constant mass was achieved. The results obtained for Copper were relatively different until a constant mass was achieved.

2. ## The role of mass customization and postponement in global logistics

Being truly customer focused is not possible if the organization is not, first information intensive. Mass customization is successful only when it can cover this need for information and communication both purposefully and efficiently. The reason for this information richness is based in comparison to the traditional push-system of mass

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