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# Studying the reaction between zinc and copper (2) sulphate solution.

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Introduction

Plan We are going to be studying the reaction between zinc and copper (2) sulphate solution. As Zinc is higher up in the reactivity series this shall be a displacement reaction in which zinc will take something away from the copper (2) sulphate solution. To do this we will be measuring the temperature rise when using different amounts of zinc. We will be reacting the zinc and copper(2) sulphate solution in a polystyrene cup as the preliminary experiment showed this to be superior to a plastic cup. Then we will measure the temperature rise of the solution. We will be using 0.5,1.0,1.25,1.50,1.75,2.00,2.25,2.50 amounts of zinc in grams. As Zinc is higher up in the reactivity series this will be a displacement reaction in which it takes something away from the copper solution. The symbol equation for this is: + + Therefore the products of this reaction are zinc sulphate + copper This is also going to be an exothermic reaction which means it gives out heat. During this experiment we shall be keeping constant the; Polystyrene cup used (cleaned after each experiment) Mass and type of zinc use (and the same sized pieces) Equipment used (e.g. thermometer) Concentrations of copper (2) sulphate solution used Time we leave for the reaction. ...read more.

Middle

Overall I think that the whole experiment went very well With no real anomalies and the results following mainly what I had said in my prediction. With the maximum temperature increase at 24. The results of my experiment are shown in the table below. Mass of Zinc Tube Colour Start Temp Max Temp Temp increase 0.50g Blue 24 35 9 1.00g Red 22 39 12 1.25g Orange 23 45 22 1.50g Green 25 48 23 2.00g Pink 25 49 24 2.25g Brown 25 48 23 2.50g Colourless 23 47 24 The test tubes we used had different colours this was so that we could tell easily which mass of zinc they contained. Here is a list of all the equipment we used during the experiment: Measuring Cylinder Test Tubes containing different masses of zinc Thermometer Polystyrene cup Copper (ii) sulphate solution Pen and book for the taking of results Safety in this experiment was quite basic as it wasn't a very dangerous reaction. Even so the basic safety rules still had to be undertaken. These include tucking away ties, wearing protective goggles, clearing away any stools or anything else which may get in the way or become a hazard. Analysing Evidence This graph clearly shows how the temperature gradually increases as the mass of zinc increases. ...read more.

Conclusion

The thermometer we used could also have improved the results we got if it had been more accurate and precise. It was impossible for us to complete all of the experiments on the same day but this is another thing which may improve the results because it would have meant a more constant R.T.P (room temperature and pressure). The main thing which could have been done to be sure of a more precise outcome of results would have been to simply do more repeats, the more repeats which are done the better the end results will be. I think that my prediction is very well backed up by my results and the graph as it reinforces everything I have said about what I expected my results to show. The graph rises and peaks off where I expected it to and overall I think the whole experiment was a complete success. If I wanted to extend my study then I could have carried out experiments involving different concentrations or amounts of CuSO . I could also do another experiment but timing it to test how fast it takes for the temperature to reach its peak when using different masses of zinc. I could also have carried out the experiment in a different type of cup and see how that changes the results. Chris Peabody 11c ...read more.

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