• 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� After 10, 15, 20, 25 and 30 minutes, 10 cm3 portions of the reaction mixture was withdrawn further from the flask and the above procedure was carried out each time.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 liquid to be filtered is poured into the cylinder and drawn through the perforated plate by vacuum suction. In our experiment, we use running tap water to produce a suction force. Actually, there are many more methods to produce the negative pressure, such as lowering the pressure using a vacuum pump.

  2. Marked by a teacher

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

    5 star(s)

    The alkoxides are then protonated on work-up with dilute acid. Examples of such nucleophiles are: LiAlH4, NaBH4 (H-) Weaker nucleophiles (neutral) require that the C=O be activated prior to attack of the Nu. This can be done using an acid catalyst which protonates on the Lewis basic O and makes the system more electrophilic.

  1. Free essay

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

    The contents of the flask were mixed thoroughly and the mixture was then titrated against sodium thiosulphate solution. 9. When the mixture was nearly colourless, two or three drops of a fresh starch solution were added and then the titration was continues until one drop of the sodium thiosulphate solution discharged the blue starch - iodine complex colour.

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

    used 16.90 cm3 16.70 cm3 16.75 cm3 Concordant results 16.70 cm3 16.75 cm3 Mass of aspirin used Accurate 1 = 0.3178g Accurate 2 = 0.3047g Accurate 3 = 0.3032g BACK TITRATION Apparatus * Aspirin * Burette * Burette stand * Conical flask * Methyl red indicator * Hydrochloric acid 0.1

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

    The distilled water in test tube 1 was poured into a tube designed for the colorimeter and was put in the colorimeter and the colorimeter was set zero. 5. The solution in test tube 2 was poured into a sample tube designed for the colorimeter and was put into the colorimeter and the absorbance of was recorded.

  2. F336- aspirin individual Investigation

    CHEMISTRY REVIEW PROJECT PAGE Possible impurities If the reaction is incomplete or if you mix the reagents in the wrong proportion, your aspirin will be contaminated with unreacted salicylic acid. It might also contain ethanoic acid or the acid catalyst.

  1. investigating the amount of ascorbic acid present in fruit

    out the average titre for the sample of orange, lime and lemon from the titration. To work out the average titre I will be using the 3 consecutive results that were in 0.1cm3 of each other. First of all, I will add my 3 consecutive titres together, and then I

  2. Preparation of Propanone

    The resulting product is wet and may be treated with inert dehydrating agents (eg: anhydrous calcium chloride) and re-distillation for purification. The ketone could be tested with a melting point pointing point test after I has reacted with a hydrazine to form a hydrazone.

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