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

Chemistry Lab Report Stoichiometry

Extracts from this document...


Chemistry SL Experiment No 2: Stoichiometry (1) Nat�lia T�thov�, 3. IB A Experiment No 2 Topic: Stoichiometry (1) Aim: Determine the number of molecules of water in copper sulphate hydrate. Results: Raw Data: Uncertainty of weighing scale : � 0.05 g Mass of dish (g) Mass of dish and sample of hydrated CuSO4 (g) Mass of dish and sample of non-hydrated CuSO4 (g) 1st trial 77.3 83.9 81.7 2nd trial 72.2 87.2 82.0 3rd trial 77.4 84.1 81.7 The sample of hydrated CuSO4 was in a solid state. It had a crystal texture and it was blue. After being heated for several minutes the copper sulphate turned into a white powder became non-hydrated (anhydrous). Uncertainty of weighing scale : � 0.05 g Mass of sample of hydrated CuSO4 (g) Mass of sample of non-hydrated CuSO4 (g) Mass of H2O in sample of hydrated CuSO4 (g) ...read more.


Mass of CuSO4 (g) Molar mass of CuSO4 (g/mol) Mass in moles of CuSO4 (mol) 2.4 18.02 0.13 4.3 159.61 0.027 For CuSO4. x3H2O = 4.8 Average = 4.7 Conclusion: The aim, to determine the coefficient of water in the formula for copper sulphate hydrate, was achieved. To get a more true result the experiment was repeated three times and an average was calculated. This average amounted to 4.7, which comes very close to the actual coefficient, which is 5. When I look at the result for the 2nd trial and the 3rd trial they are identical (however the 1st is not). This proves that we were quite precise if not that accurate. Evaluation: Though the experiment was very straightforward, errors have been made and there was sill space left for improvement. To start off, I would have to say that my preparation for the lab was insufficient. ...read more.


This had a slight effect on the mass. This could easily be avoided if we had taken more care with choosing the equipment and making sure it was fit to be used (cleaning it). The weighing scale used measures to one decimal place which doesn't the result very accurate. The readings were used in the calculations and so according to the rule of significant figures the result were given in two significant figures. Since more than one calculation was done to get the final result, this would cause the results to be less accurate than desired. If possible, a scale measuring to two decimal places would be helpful in being more accurate. The experiment could be improved by performing two more trials, making the total five. Since three repetitions is the minimum for subsequent average calculations, this would only help to make the experiment more factual. But then again this would require more time, which we did not have at the time. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry 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 International Baccalaureate Chemistry essays

  1. IB chemistry revision notes

    o Argon and Xenon can form a bond. So these as the bottom of the group could have electronegativity values, but those at the top can't. * Halogens and Halides o Halides are the ions of the Halogens o The more electronegative the halogen elements are, the more able they

  2. Can one determine the coefficients of a balanced chemical equation by having the mass ...

    � After filtering the solution, a brick-red,flaky,solid metal stayed on the filter paper while a clear solution was filtered to the bottom. Data Table 2 - Quantitative Data Table Masses Values Mass of Aluminum(�0.01g) 2.48 Mass of Aluminum After Reaction(�0.01g)

  1. titration experiment report

    orange as an indicator because we were working with a strong acid and a weak base. On the other hand, we used different indicator in part 2, since we were dealing with a strong acid with strong base. Processed data: Equations used Part 1: > n()

  2. Group 4

    When many molecules hit the wall, a large force is distributed over the surface of the wall, which gives pressure. An important fact derived from the kinetic theory of gases shows that the average kinetic energy of the gas molecules depends only on the temperature.

  1. The chemistry of Alcohols

    Observations: The orange solution turns dirty green and light green precipitate is formed that sediments at the bottom of the test tube. Inference( partial oxidation of primary alcohols): Ethanol is a primary alcohol. Primary alcohols can be oxidized to aldehydes or carboxylic acids depending on the reaction conditions.

  2. Change of Potential Difference in Voltaic Cells Lab Report

    Weigh 14.377g of zinc sulfate hepta-hydrate using 0.01 (�0.005) digital balance and carefully pour the zinc sulfate to the 50 mL volumetric flask. 4. Add about half the volume (25ml) of distilled water needed and swirl the flask. When most of the solid has dissolved add the rest of the water stopping below the mark on the flask.

  1. Electrolysis of copper sulphate

    Weigh each cathode using electronic balance. Record this result in a table as final mass. 4. Repeat this experiment for the currents of 0.4, 0.6, 0.8 And 1 Amps keeping time constant to two minutes. Be sure to sand each cathode for each of the trials.

  2. Research report on Stoichiometry

    Stoichiometry helps you figure out how much of a compound you will need or maybe how much you started with. We want to take the time to explain that reactions are dependent upon the compounds involved and how much of each compound is needed.

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