• 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)

    After the final evaporation, the remaining liquid was again made up to 25cm3 with deionised water, ensuring that the evaporating cylinder was thoroughly washed out, to ensure that all of the liquid was transferred. This liquid was then transferred to a beaker, and a magnetic stirrer added, and titrated as above, using the pH meter to record pH against volume.

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

    For example, if the volume of potassium permanganate used was 12.30cm3; n=cv [KMnO4] = 0.02moldm-3; v = 0.0123dm3 n = 0.000246mol Ratio of MnO4-:H2C2O4 is 2:5 Therefore, n(H2C2O4)

  1. Electrochemistry - Redox reaction.

    Cell diagram: Fe(s)| Fe2+(a.q) || Pt | Ni2+(a.q)| Ni (s) 5 FeSO4 & CuSO4 According to Appendix A, Fe is better reducing agent than Cu and Cu2+ ions were better oxygenating agent than Fe2+. Hence, Fe side was the anode of the cell and Cu side was the cathode of the cell.

  2. The aim of this experiment is to investigate the enthalpy change of combustion for ...

    These results were slightly more reliable but not particularly accurate, however slight trend can be seen. The results were more reliable as three repeat readings were taken for each alcohol and an overall average of the enthalpy change of combustion taken.

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

    Therefore, the actual concentration of vitamin C will be lower. Such that the mass of vitamin C calculated will be smaller. To reduce this error, the vitamin C should avoid placing under direct sunlight. It should be placed in a cool place with air-tight bottle.

  2. investigating the amount of ascorbic acid present in fruit

    Keep repeating the titration method until you get 3 consecutive titres which are within 0.1 of each other.

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

    the concentration of each species separately * Need to crouch on one knee to get a level table view of the measuring cylinder, as a high degree of accuracy is required when producing the different concentrations * Need to double check the volumes used * Experiment needs to be carried

  2. Finding the concentration of an acid sample

    By using the equation: Moles = Mass/Mr If I put in the values I already know: 0.1 = ?g/106 Then I can rearrange it to get the mass in 1 dm3: 0.1 x 106 = 10.6g However as 1 dm3 = 1000cm3 then to get the mass for 250cm3 all I have to do is divide by 4.

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