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

Investigation of the Order of the Reaction of Iodine with Propanone

Extracts from this document...

Introduction

F.6 Chemistry Experiment Date 7th March 2008 Experiment No. 15 Title Investigation of the Order of the Reaction of Iodine with Propanone Objective To investigate the order of the reaction of iodine with propanone. Introduction The rate of a chemical reaction is affected by the concentration of reactants according to the rate equation, which has to be determined experimentally. Iodine react with propanone as following: CH3COCH3(aq) + I2(aq) CH3COCH2I(aq) + HI(aq) By titrating the remained iodine in the reaction mixture against standard sodium thiosulphate solution at various times, the rate of reaction can be determined. By further varying the initial concentration of propanone while keeping the initial concentration of iodine constant, the relationship between rate of reaction and concentration of propanone can also be established. Experimental Procedure � 25.0 cm3 of sodium thiosulphate solution was diluted to 250 cm3 in a standard flask. � 25 cm3 of sulphuric acid, V1 cm3 of propanone solution and V2 cm3 of distilled water was measured using a ...read more.

Middle

� After 10, 15, 20, 25 and 30 minutes, 10 cm3 portions of the reaction mixture was withdrawn further from the flask and the above procedure was carried out each time. Results Time when the reation mixture was added to NaHCO3 / min 5 10 15 20 25 30 Final burette reading / cm3 20.12 18.00 16.40 14.74 13.11 11.80 Initial burette reading / cm3 00.02 00.00 00.00 00.04 00.01 00.00 Volume of Na2S2O3 used / cm3 20.10 18.00 16.40 14.70 13.10 11.80 Pair No. A B C D Gradient of Graph 1 / cm3 min-1 0.282 0.257 0.189 0.123 Conclusion The gradient of graph 1 is -0.33 and that of graph 2 is 0.010. As the reaction rate in does not change with the decreasing concentration of iodine, the order of reaction with iodine is 0. As the reaction rate increases with the concentration of propanone, the order of reaction with propanone is 1. ...read more.

Conclusion

of moles of S2O32- = 2 x 0.0001 = 0.0002 mol Volume of sodium thiosulphate = 19.7 cm3 Concentration of S2O32- = ( 0.0002 x 10 ) / ( 19.7 / 1000 ) = 0.102 M Discussion The temperature during the experiment is not constant, it affects the rate of reaction and thus the result. To improve the experiment, some known amounts of reactants are placed in a thermostatic bath for several minutes to allow the temperature of the reactants to reach the temperature of the thermostatic bath. Also the experiment was not conducted accurately, as pipette was not used as often as it should have been. To improve the experiment, pipette should be used to deliver the reaction mixture into the conical flask A colorimeter could be used to provide the most accurate result. Moreover, repeat the titration several times can also eliminate the effects bought by error. For further investigation, we can investigate the effect of temperature on the order of the reaction of iodine with propanone by allowing iodine react with propanone at different temperature. Reference http://qcrc.qef.org.hk/proposal/2000/2000-1245/2000-1245-D04-32143.DOC Lab menu ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Organic 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 AS and A Level Organic Chemistry essays

  1. Marked by a teacher

    Preparation of propanone from propan-2-ol

    5 star(s)

    The suction flask provides a negative pressure and together with the gravitational force, the filtration will be much faster. The crystal and the filter paper can also be air dried quickly. A picture of a suction flask The filter paper is placed on the plate, and the filter paper is moistened with a solvent to prevent initial leakage.

  2. Marked by a teacher

    Reactions of aldehydes and ketones. The purpose of this experiment is to compare ...

    5 star(s)

    sulfate, as bidentate ligands giving the bistartratocuprate(II)4- complex. The tartarate ions, by complexing copper prevent the formation of Cu(OH)2 from the reaction of CuSO4.2H2O and NaOH present in the solution. The Copper (II) ion is reduced to copper (I) oxide which is a red ppt, and in some cases, to copper metal (copper mirror).

  1. Free essay

    Experiment to determine the order of the reaction of Iodine with Acetone by using ...

    The table below shows the volume of sodium thiosulphate solution used against time. ( data for graph 1) Time started/ min 6:00 12:30 18:00 21:00 24:00 27:00 Final reading/ cm3 39.55 29.50 43.90 28.95 42.65 32.60 Initial reading/ cm3 23.15 14.20 29.50 14.75 28.95 19.70 Titre/cm3 16.40 15.30 14.40 14.20 13.70 12.90 Temperature readings remain constant during the experiment: 22.5?.

  2. F336- aspirin individual Investigation

    Thin-layer chromatography is a qualitative procedure. If the level of impurity in your sample is low, you may not be able to detect it. A back titration There is also a different acid-base titration you can do to find out about the purity of your aspirin.

  1. The aim of this experiment is to produce Aspirin. This is an estrification in ...

    * The capillary tube was placed in the melting point apparatus and the crystals were observed through a magnifying glass of the apparatus. * The range at which the aspirin melted was noted. The experiment was then repeated for pure aspirin. Results Compound Melting temperature (c) Re-crystalised aspirin 130-135 (c)

  2. Comprehensive and Detailed Chemistry notes

    The ethyl hydrogen sulfate reacts with water,generating ethanol; sulfuric acid reforms CATALYTIC HYDRATION: -- Ethanol can be prepared by catalytic hydration of ethylene -- Ethylene and steam are passed over a zeolite surface impregnated with phosphoric acid -- Phosphoric acid is the catalyst -- The temperature of 300 degrees is

  1. The aim of this experiment is to obtain the rate equation for the reaction ...

    Test tube Volume of 0.020M I2 solution /cm3 Volume of distilled water /cm3 [I2(aq)] / mol dm-3 1 0.0 10.0 0 2 1.0 9.0 0.0020 3 2.0 8.0 0.0040 4 3.0 7.0 0.0060 5 4.0 6.0 0.0080 6 5.0 5.0 0.010 4.

  2. investigating the amount of ascorbic acid present in fruit

    the titration experiment with the samples of fruit I used can be seen in appendix A, appendix B and appendix C. Appendix A gives the result for the orange sample, appendix B for the lime sample and appendix C for the lemon sample.

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