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

Investigating the thermal decomposition of Zinc Carbonate.

Extracts from this document...

Introduction

Investigating the thermal decomposition Of Zinc Carbonate Znco3 heat Zno + Co2 (Td) Aim:- To relate the amount of zinc carbonate heated to the amount of zinc oxide produced. Planning:- The variables in this experiment are the heat, the amount of time you heat it for. The variable that I am going to investigate is the heat (temperature) of the Bunsen burner. This can be varied by having it on the blue roaring flame, (which is the hottest_ or the yellow safety flame (which is the coolest). From this it can make the zinc carbonate decompose quicker depending on which flame you use. So if it is on the yellow safety flame the zinc carbonate will take a longer time than it would if you were to use the blue roaring flame I will make sure that my experiment is a fair test by:- when I weigh each test tube make sure that the scales are on zero for every time that I weigh them. When I weigh the test tubes I will let the test tube stand for 5 seconds before I take the reading off of the scales. ...read more.

Middle

test tube take that away from the mass of the test tube plus the zinc carbonate this will give you the actual mass of zinc carbonate. Once I have done this I will find the expected mass of zinc oxide, I will do this by taking the mass of reactant and divide that by the formula mass of the reactant and times that by the formula mass of product. I will do this for every test tube. I shall heat all the test tubes until the substance has gone a very pale yellow, once this is done I will weigh all the test tubes (which are still containing the solid) after heating to get the new mass. I will then find the mass of zinc oxide obtained by taking the mass of the empty test tube away from the mass of test tube after heating. Once I have done this I can find the percentage yield of zinc oxide to do this you have to get the actual mass and divide that by the expected mass and times it by 100. Prediction:- The more zinc carbonate we start with the more zinc oxide we will get. ...read more.

Conclusion

There is a three point rise and then a drop and then a rise again. My data supports my prediction as the amount of ZnO3 increases so does the amount of ZnO. Evaluation:- When looking at my graph my results closely match my predicted masses, and so I think that my results are accurate. I could improve them by working out my results/predicted masses with a better set of scales, ones that measure to three decimal places. I think that I have one anomaly, which I have circled on my graph. I think that it is possible that I have this because I may have not given the reaction enough time in the Bunsen burner flame, which could have left some un - reacted ZnCo3 which wouldn't give me an accurate result for that one. I think my experiment went well, but if I could do it again, I would have a wider scale of measurements, ranging from as close as 0.5g to perhaps 5g then I could plot a more detailed graph, and therefore have better and more accurate results. Yes my data is reliable as it does support my conclusion. Naomi Wood 11YP ...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. To investigate the thermal decomposition of copper carbonate and try to prove that the ...

    That result should be around 35.5% and I predict a range of 30% to 41%. That gives a margin of 5.5% on either side. I will need: * Bunsen burner It will be laid out like this: * Crucible and lid * Tripod * Tongs * Chalk stand * Copper

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

    7. Repeat the experiment one more time so that there are two different values for this value of mass of zinc, and from that an average can be obtained. Repeat steps 1-6, using four more different values of the mass of the zinc, which will be 0.2g, 0.35g, 0.5g and 0.65g, so that altogether there are five different values of mass.

  1. Thermal Decomposition of copper carbonate

    Equation 2: CuCO3 (s) � CuO (s) + CO2 (g) CuCO3: CO2 1 : 1 No. of moles of CuCO3 : No. of moles of CO2 Volume of gas = no of moles x 24000 = 0.0801 x 24 = 1944 cm� 10g = 1944 cm� 1g = 194.4 cm�

  2. Free essay

    Periodic table

    Mutagens - Factors that trigger a mutation in the cells. Changes in the letter of a word can change the word's entire meaning. Gene mutations ==> uncontrolled cell division which can result in cancerous tumours. Not all mutations are harmful i.e. for insects it is part of their survival mechanism.

  1. Ions - a qualitative analysis on our chemicals by flame testing.

    Once the Bunsen burner had been lit I took hold of the metal wire and created a loop on the end of the wire. Then a sample of the chemical to be tested was took on the end of the loop and placed in to the centre of the combustion flame of the Bunsen burner.

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

    33.80 10.60 1.5 23.75 34.75 11.00 1.7 22.85 34.05 11.20 Interpretation of Results By looking at my graph, I can see that there is a relationship between the mass of zinc and the temperature rise - as the mass increased, the temperature of the copper sulphate solution increased.

  1. Decomposition of copper carbonate - proving one of two equations.

    Pilot Experiment Heat 0.1g of CuCO3 in the apparatus as set up above. Record the volume of gas collected in the gas burette. When no more gas is being evolved, remove the apparatus from the water (to prevent suck-back) and stop heating. Pilot Results Initial volume (cm3) Final volume (cm3)

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

    In his seminal text on mass customization, Pine [1, p. 6] argues that "Customers can no longer be lumped together in a huge homogeneous market, but are individuals whose individual wants and needs can be ascertained and fulfilled."

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