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

Titration Lab

Extracts from this document...

Introduction

Chemistry Lab Report Kevin Schulze 11th IB SL Chemistry 10/11/10 Redox Titration with Potassium Permanganate Research Question How much amount is needed to titrate redox with potassium permanganate? Background Theory An acidified solution of manganate or permanganate ions are both strong oxidising chemical agents. Hypothesis/Predictions My hypothesis is that it will take approximately 10-15 drops of redox in order titrate redox with potassium permanganate. Key Variables Independent: Titration of potassium permanganate. Dependent: Amount of redox to titrate the potassium permanganate. Controlled: Amount of potassium permanganate, amount of force put in, temperature of the liquids. Apparatus AR ammonium iron (II) sulphate Crystals Sulphuric Acid Weight Scale Volumetric Flask/Conical Flask Distilled Water Pipette Method for Control of Variables 1. In order to control the titration of potassium permanganate, we used the pipette to make the titration constant. We also used the same amount of chemical solutions, with the same flasks, to make the titration as constant as possible. 2. To control the amount of redox in the experiment, we have used the pipette to keep on putting the same amount of drop every time. ...read more.

Middle

4. I have used the pipette to pipette 10cm� of the solution into a conical flask and added about an equal volume of distilled water. 5. I titrated this with 0.0200mol dm-� potassium manganate (VII) solution to a faint pink color. 6. I repeated the titration for at least 2 times for accuracy in the data and recorded all the results. Table of Raw Results Table Showing Volume of KMnO4 Used to React With the Solution Initial Reading Final Reading Volume of KMnO4 Trial 1 0.00 10.00 10.00 Trial 2 10.00 20.00 10.00 Trial 3 20.00 30.00 10.00 Trial 4 30.00 41.00 11.00 Trial 5 41.00 51.00 10.00 Trial 6 0.00 10.00 10.00 Table of Processed Results Table Showing Volume of KMnO4 Used to React With the Solution in cm��0.05cm� Initial Reading/cm��0.05cm� Final Reading/cm��0.05cm� Volume of KMnO4/cm��0.10cm� Trial 1 0.00 10.00 10.00 Trial 2 10.00 20.00 10.00 Trial 3 20.00 30.00 10.00 Trial 4 30.00 41.00 11.00 Trial 5 41.00 51.00 10.00 Trial 6 0.00 10.00 10.00 Average 16.83 27.00 10.17 Standard Deviation 16.62 16.78 0.41 The error or uncertainty of this data is �0.05cm�. ...read more.

Conclusion

The main aim of this experiment, titration of redox with potassium permanganate, was well presented, and overall the experiment was good. Problem Calculation 1. MnO4- + 8H+ + 5Fe- = Mn2+ + 4H2O + Fe3+ 2. 5 moles of Fe2+ is required. 3. 10cm3 = 0.01dm3 0.02 mol dm-3 x 0.01 dm3 = 0.0002 mol 0.0002 moles of KMnO4 is present. 4. MnO4- : Fe2+ 1:5 0.0002 mol : 0.001 mol 0.001 moles of Fe2+ is present in 10cm3 of the solution. 5. 0.001 mol x 10 =0.01 mol 0.01 moles of Fe2+ is present in 100cm3 of the solution. 6. 1 mole of Fe2+ = 56grams 56g x 0.01 mol = 0.56g 0.56 grams of Fe2+ is in the ammonium iron (II) sulfate 7. Number of moles of ammonium iron (II) sulfate = 39 0.56g/(39mol x 0.1) = 14.4% 8. 1 mol of ammonium iron(II) sulfate = (NH4)2Fe(SO4)2 x 6H2O = 2N + 8H+ 1Fe+ 2S + 8O + 12H + 6O = 392 grams 56g/392g = 14.3% 9. My result was 14.4% and it is almost equal to the correct value which is 14.3%. The difference is only 0.1%. 10. The iron (II) salt might evaporate if I heat it, and will affect the result. ?? ?? ?? ?? ...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. Estimating the Iron(II) content in an iron tablet using a standard solution of potassium ...

    This would explain the smaller obtained value. It was also found that the percentage error value was significantly bigger than the percentage uncertainty. This suggests that there was systematic error in this experiment. A possible way to solve this problem is to calibrate the burette and pipette next time before conducting the experiment.

  2. IB chemistry revision notes

    Then, energy is released as new bonds are made. * If energy is lost (exothermic reaction), then the products are more stable than the reactants. In endothermic reactions, the reactants are more stable then the products * Breaking bonds -->endothermic, + * Making bonds --> exothermic, - Hess' Law It

  1. Volume of a Drop Lab

    Make sure to apply relatively the same amount of pressure when squeezing the bulb of the pipet to release the drops. 5. Record this set of data in order to calculate the volume 6. Compare the two volumes that were obtained in both these sets of procedures with the

  2. Change of Potential Difference in Voltaic Cells Lab Report

    Weigh 12.485g of CuSO4.5H2O using a 0.01 digital scale, and carefully put the blue crystals in the 50 mL volumetric flask using the funnel. 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. Chemistry Extended Essay - Viscosity of Xanthan Gum solutions

    is k1[A][B], whereas the backward rate of reaction is k-1[C]. The rate equation (RE) for species C is then given by the familiar classical equation: A crucial assumption implicit in REs is that the local concentration at each point in space inside the container must equal the global concentration at all times.

  2. Enthalpy Change Design Lab (6/6)How does changing the initial temperature (19C, 25C, 35C, and ...

    and KOH(aq) in a doubled polystyrene cup. Since molar enthalpy is determined through a few different values that need to be collected during the investigation, the steps taken to determine the molar enthalpy of the reaction of 1.00 mol dm-3 HCl(aq)

  1. Chemistry Titration Acid Base Lab

    of 1.4ml. The other trials all had a difference of 0.9ml for using this specific indicator. This can be seen in all tests using different indicators except one represented in data collection table A, Bromocresol green. This proves that there were systematic and/or random errors that took place during the lab.

  2. The chemistry of atmospheric and water pollution.

    MEASURING BIOCHEMICAL OXYGEN DEMAND (BOD) Two samples of water are taken with one of them placed in a sealed air-free container and incubated at 20ºC for 5 days in the dark. Meanwhile the other sample’s dissolved oxygen concentration is immediately determined upon collection by one of the methods explained above.

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