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

An experiment to show how the amount of zinc oxide produced is affected by the amount of calamine used.

Extracts from this document...


Planning Aim: In this experiment I plan to experiment how the amount of zinc oxide produced is affected by the amount of calamine used. Hypothesis: I predict that the more calamine used the greater the amount of zinc oxide produced. This is because the equation of the reaction must have an equal amount on each side. The equation is ZnCO� ZnO+CO�. From this it can be seen that for every atom of zinc contained in the calamine it produces the same number of atoms in zinc oxide. Therefore I hypothesise that there is a direct positive correlation and would expect the graph to show a straight line In a previous experiment where copper carbonate was obtained from malachite the results showed that as the more malachite was used the more product was produced. The relationship between the mass of malachite used and the amount of copper oxide obtained was proportional. Malachite and calamine are next to each other in the periodic table and therefore are alike so I predict that the more calamine used the more zinc oxide will be produced. The theoretical conversion graph also supports this idea. Therfore i think that the relationship between the calamine used and zinc oxide produced will also be proportional. Using the theoretical conversion graph I can predict that from every gram of calamine heated about 0.6g of zinc oxide will be produced. This is evident later on in my coursework. The graph I expect to obtain is similar to the one I have drawn below. ...read more.


Weight after 2 minutes (g) Change in Mass Mass of Zinc Oxide 30.16 32.16 2 31.24 31.24 0.92 1/08 29.49 31.99 2.5 31.09 31.09 0.9 1.6 29.24 32.24 3 30.94 30.94 1.3 1.7 29.76 33.26 3.5 32.06 32.06 1.2 2.3 30.24 34.24 4 32.74 32.74 1.5 2.5 Experiment Two After taking 5 different readings, we decded to repeat the experiment so we could take an average of two readings in order to create a more accurate visual representation in the form of graph. The second set of reults is below. Evaluating Evidence Theoretical conversion chart: ZnCO� ZnO+CO�(already balanced) One mole of ZnCO� gives 1 mole of ZnO (C=12, O=16, Zn=65) ZnCO� ZnO 65+12+48=125 65+16=81 One gram of ZnCO� gives 81/125=0.648 grams of ZnO Mass of calamine(g) Calculation Mass of zinc oxide(g) 2.0 Multiply by 0.648 1.3 2.5 Multiply by 0.648 1.62 3.0 Multiply by 0.648 1.94 3.5 Multiply by 0.648 2.268 4.0 Multiply by 0.648 2.591 To compare the theoretical conversion chart with the results I gained I will work the percentage yield. This is done by taking the actual amount gained dividing it by the expected amount (theoretical) and times by 100. Here are the percentage yields I worked out. Mass of Calamine used Mass of Zinc Oxide Weight of Zinc Oxide Produced (g) Percentage yield (%) 2 1.3 1.43 1.08 2.5 1.62 1.8 1.6 3 1.94 2.19 1.7 3.5 2.268 2.51 2.3 4 2.591 2.92 2.5 Mass of Calamine (g) Predicted amount of ZnO to be obtained (g) ...read more.


the same for two consecutive weightings, the calamine could have needed a higher temperature applied to it to fully complete the reaction. This is why I reapeated the experiment and then achieved a new set of results which were all below the the theoretical amounts. The mineral wool, (used to stop small particles of zinc oxide escaping with the CO2) could have also stopped other matter in the calamine (which is not used for producing zinc oxide) from escaping. I think my results were also quite reliable as there wasn't very much scatter on my graph, all the points were close to my line of best fit. I also believe my results were reliable as the differences between the results in the first experiment and the results in the second were quite small. An exception to this was the experiment for 3g of calamine in experiment 1 the amount of zinc oxide obtained was 2.19 and in experiment 2 the amount obtained was only 1.7, a difference of 0.5g. If I could re-do this experiment I would like to repeat the whole experiment for a third time or at least do a third test using 3g of calamine, this would improve the accuracy of my results as it would help determine anomalous results, which would let me have the choice to not include it in my averages results. This reslut wasn't necessary anomoulous when considered as an average of the two experiments but it was the closest I got to having an anomolie. GCSE Chemistry Obtaining Zinc Oxide From Calamine Roy Vivasi 11PB ...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. Investigating the Factors Affecting the Temperature Change Between Zinc and Copper Sulphate

    The dependant variables will be measuring the temperature of the copper sulphate solution and the independent variable will be the different masses of zinc powder used. Experimental Procedure Aim In this experiment, I will be investigating how temperature is affected when different masses of zinc are added to copper sulphate.

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

    0.5g, 0.65g and 0.8g Equipment List The apparatus that is needed in order to carry out this experiment is: * Polystyrene cup * Plastic lid to fit the polystyrene cup * A 250ml beaker to support the polystyrene cup and to provide extra insulation * Thermometer ( 0 - 100�C in 1�C graduations )

  1. The aim of this investigation is to try and find out the percentage of ...

    I also noticed some white specks in the malachite when all of it had turned black. Analysing evidence: CALCULATIONS: EXPERIMENT 1 Mass of crucible = 18.29g Mass of crucible + malachite = 20.29g After heating = 19.84g Mass of malachite used = 20.29g - 18.29g =2g Mass of residue =

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

    Many though are still sceptical. They continue with the familiar mass production model of few product choices, long production runs, uniform distribution, and apparent low cost. This incremental, low risk approach allows a company to sense, lead and retain their existing customer base.

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

    When mass of zinc is 0.4g, temp rise is 6.2 degrees celsius. When the mass of zinc is 0.15g, temp rise is 2.3 degrees celcius. When the mass of zinc is 0.3g, temp rise is 4.6 degrees celsius. As can be seen from the two trends above, as we double

  2. Free essay

    Periodic table

    The sugar and phosphate stay the same but the nitrogenous base changes i.e. it could have any of the letters A T C G but it will still have sugar and a phosphate attached to it. The rules: ATCG always stands for: (they never change when attached to DNA)

  1. An experiment to investigate the factors that determine the amount of energy released when ...

    of the different atoms in one molecule of the compound added together. Hence, with the alcohols, as the number of carbon atoms in alcohol molecule increases, the mass of one mole of the alcohol will also increase since the size of the alcohol molecule will increase.

  2. To investigate the rate at which different metal carbonates decompose (thermally) by measuring the ...

    allowing for the reaction to take place and as a result more carbon dioxide will be produced. In order to obtain reliable results each metal carbonate must be heated for the same amount of time. The temperature of the type of flame I use to heat my carbonate and the

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