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

An Investigation Into How the Mass of Zinc Effects the Heat Change In the Displacement Reaction Between Zinc and Copper Sulphate.

Extracts from this document...

Introduction

GCSE Chemistry An Investigation Into How the Mass of Zinc Effects the Heat Change In the Displacement Reaction Between Zinc and Copper Sulphate This investigation aims to look at how a factor can change the amount of heat produced in a displacement reaction. The displacement reaction that will occur during this experiment will be an exothermic reaction, which will mean that heat will be given out to the surroundings. The possible independent variables that could be investigated are: * The mass of zinc * The pressure of the surrounding atmosphere * The concentration of the copper sulphate * The surface area of the solid reactant, i.e. the zinc * The volume of copper sulphate * The light intensity * The pH of the copper sulphate I have chosen to vary the mass of the zinc, as it is simple and easy to measure and control. Therefore the controlled variables will be: * The concentration of the copper sulphate * The volume of the copper sulphate The dependent variable that I will be measuring, will be the temperature change of the reaction. ...read more.

Middle

21 20 34 34 13 14 13.5 25 x 4.2 x 13.5 1418 0.65 21 20 39 38 18 18 18 25 x 4.2 x 18 1890 0.8 20 21 45 42 25 21 23 25 x 4.2 x 23 2415 ANALYLSIS The shape of the graph shows us that an increase in the amount of zinc, results in an increase in the heat change. The results obtained from the line of best-fit show that that the amount of zinc (g), is directly proportional to the heat change of the reaction: * At 0.2g the heat change is 600J * At 0.4g the heat change is 1200J * At 0.6g the heat change is 1800J * At 0.8g the heat change is 2400J These results agree with my hypothesis, which is that an increase in the amount of zinc that is added to 25cm�, results in an increase in the heat change of the reaction, and this means that the obtained graph is a similar shape to my predicted graph. I also expected to see that the heat change for 0.2g of zinc would double for the heat change using 0.4g of zinc, and so the heat change would be directly proportional to the amount of zinc. ...read more.

Conclusion

* The amount of copper sulphate not being measured out exactly * The apparatus could have been dirty from the previous experiment that had just taken place, and so there could have been some extra copper sulphate solution or zinc in the cup. I think that my results are accurate as the majority of the results are close to the curve, and there is only one anomalous result. My results are therefore reliable and this is shown when they prove that an increase in the mass of the zinc resulted in an increase in the heat change of the reaction. As a good set of results has been obtained from the experiment, I think that I have chosen an appropriate range of measurements. To improve the result that were produced in a future experiment, the volume of copper sulphate solution would be measured out more precisely, the apparatus would be cleaned out more thoroughly, and the hole around the thermometer could have a seal placed around it. In order to extend this investigation I could investigate the other different independent variables, such as pressure, concentration of copper sulphate solution or volume 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 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

See related essaysSee related essays

Related GCSE Classifying Materials essays

  1. Marked by a teacher

    In this CDA I will write about how plastic bags are made, why plastic ...

    I used Tesco bags, Somerfield and also Waitrose. Apparatus: - Clamp - Stand - Boss - Safety cushion - 100g mass - 3 plastic bags from 3 different supermarkets I set the apparatus like the diagram below With each plastic bag, I hooked it onto the boss and slowly dropped each weight into the bag until the bag broke onto the safety cushion below.

  2. Investigating the energy change when zinc reacts with copper(II) sulphate.

    Using this temperature rise, I will calculate the energy released using the formula MC T. M= mass of zinc C= constant specific heat capacity of water 4.18 T= temperature rise. Preliminary experiment. I carried out the experiment as shown in the method and obtained these results: Mass of zinc (g)

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

    it is an endothermic reaction. When bonds are made energy is released, and therefore it is and exothermic reaction. When copper sulphate and zinc are reacted together, the bonds that are broken are: Cu - SO4 Zn - Zn atoms atoms This is an endothermic reaction because energy is put in so the bonds can be broken.

  2. Chemistry Coursework. Aim: To find out if the thickness of plastic bags is ...

    However, the Virgin plastic bag was the thickest, at 0.08mm thick, and it also held the most mass of all the bags, (2700g.)This is almost double the mass of a bag of half the thickness, 0.04mm. From the results, it is clear that the Morrisons bag must have stronger covalent

  1. Rate of reaction of different concentrations of sodium thiosulphate.

    do this on a flat, level surface so the measuring is precise. Step 3- Measure out the amount of water needed at this stage (0cm3, 10cm3, 20cm3, 30cm3, 40cm3) in a measuring cylinder of 100 cm3. Again clarify the meniscus level to the amounts needed.

  2. Affect of concentration on reaction

    0.03 20 5.37 0.04 25 5.36 0.05 30 5.35 0.06 35 5.34 0.07 40 5.33 0.08 45 5.31 0.10 50 5.29 0.11 Analysis As the results are shown, mass loss is too slow and the amount of calcium carbonate cannot be weighed accurately, also the surface area varies with the different size and shape of calcium carbonate chips.

  1. GCSE Chemistry - Obtaining Zinc Oxide from Calamine

    will get 1.30 g of calamine so I can predict how much calamine I will get. Also the more calamine that I put into the boiling tube the more calamine will be produced, because there is more calamine to react.

  2. formula for copper sulphate

    sulphate, suggesting a chemical bond. The small variations between trials may be caused by improperly calibrated balances or not completely driving all the water off of the sample. I did not allow the sample to cool completely in the last run, so that might have introduced an error as well.

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