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

Redox Titration Aims/Objective : To determine the molar concentration of the given KMnO4 solution.

Extracts from this document...

Introduction

Chemistry TAS Report 1. Experiment Number : 16 2. Date : 30/04/2008 3. Title : Redox Titration 4. Aims/Objective : To determine the molar concentration of the given KMnO4 solution. 5. Introduction / Theory: 6. Relevant Equations/Chemical Reactions Involved : Half-equation : MnO4-(aq) + 8H+(aq) + 5e- � Mn2+(aq) + 4H2O(l) C2O42-(aq) � 2CO2(g) + 2e- Overall equation : 2MnO4-(aq) + 16H+(aq) + 5C2O42-(aq) � 2Mn2+(aq) + 8H2O(l) + 10CO2(g) 7. Chemicals : Oxalic dehydrate acid crystal 1.58 g KMnO4 solution 80 cm3 1 M dilute sulphuric acid 80 cm3 8. ...read more.

Middle

by distilled water. 3. 25 cm3 of oxalic acid was pipetted in a conical flask. About 25 cm3 of 1 M dilute sulphuric acid was added to it so that the solution was acidified. 4. The mixture was heated to about 60 oC by Bunsen burner. 5. The hot mixture was titrated with KMnO4 solution until the colour changed form colourless to pink. 6. Steps 3 to 5 were repeated for two more times. 10. Observations : The colour changed from colourless to pink at the end point. 11. Data, Calculation and Results : Trial 1 2 Final burette reading / cm3 22.20 42.45 43.65 Initial burette reading / cm3 2.00 22.25 23.50 Volume of titrant / cm3 20.20 20.20 20.15 Volume of titrant = (20.20 + 20.15) ...read more.

Conclusion

of mole of oxalic dihydrate acid crystal = 1.58 / 126 = 0.0125397 mol Molarity of the prepared oxalic dihydrate acid solution = 0.0125397 / (250 x 10-3) = 0.05 M No. of mole of potassium permanganate solution = No. of mole of 25 cm3 of oxalic dihydrate acid solution x 2/5 = 0.05 x 25 x 10-3 x 2/5 = 5 x 10-4 mol Molar concentration of the given KMnO4 solution = 5 x 10-4 / 20.175 x 10-3 = 0.0248 M 12. Conclusion : The molar concentration of the given KMnO4 solution was found to be 0.0248 M. 13. Discussion : 1. In this redox titration, no indicator is required as the end point can be determined by the colour change of reactant (KMnO4 solution). 2. ...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

    Experiment to Determine Acidities of Wine. The purpose of this experiment is to ...

    5 star(s)

    This evaporating basin was then placed on the steam evaporator and the wine was evaporated until very little remained. This was topped back up to 25cm3 with deionised water, and this process was repeated twice, to ensure that all the volatile acids had evaporated away.

  2. Comprehensive and Detailed Chemistry notes

    of sucrose: C12H22O11 + H2O � 2C6H12O6 Fermentation of glucose: C6H12O6 � 2C2H5OH + 2CO2 Net: C12H22O11 + H2O � 4C2H5OH + 4CO2 * define the molar heat of combustion of a compound and calculate the value for ethanol from first-hand data -- The molar heat of combustion is the

  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. Aim: To determine how the concentration of each species in a reaction affects the ...

    carefree by not crouching on one knee to get a level table view of the measuring cylinders or double checking the volumes used. This obviously affected the precision at which he carried out the experiment. Also, he didn't test the stopwatch before using them in the experiment which could have meant that false times were produced.

  1. Electrochemistry - Redox reaction.

    A clean metal electrode was placed into each beaker, which was similar to the ion present in the beaker. The beakers were stuck to the desk with blue-tac. Crocodile clips and wires were connected a voltmeter between electrode and put into the corresponding beakers, which did not contact with the

  2. Finding the concentration of oxalic acid in a mixture with sulphuric acid

    Use the clamp to connect the burette with the retort stand. 3) Use the funnel to fill the burette with the potassium permanganate until the meniscus reaches zero. 4) Place the conical flask with the mixture underneath the point of the burette.

  1. Finding the concentration of an acid sample

    I will have to make it my self. However I must first work out how much of the Na2CO3 I will need to dissolve into distilled water. As we have been told that the concentration of the Sulphuric acid is between 0.05 and 0.15 mol dm-3.

  2. Chem Lab report. Objective: To determine the content of vitamin C in ...

    of moles of KIO3 used �3 - No. of moles Na2S2O3 �2) �10 � Molar mass of vitamin C Results: Part A: Standardization of sodium thiosulphate solution Mass of weighing bottle + solid potassium iodate(V) = 4.48g Mass of weighing bottle = 3.96g Mass of solid potassium iodate(V)

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