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

Rate of Reaction sodium thiosulphate

Extracts from this document...

Introduction

Rate of Reaction Investigation with Sulphuric acid and Sodium thiosulphate Aim: The aim of this is investigation is evaluating an aspect that affects the rate of reaction between sodium thiosulphate and sulphuring acid reaction. Hypothesis: I predict that when the concentration of sulphuric is increased and all volumes are kept the same, the rate of reaction for the reaction will increase because increasing the concentration of a reactant increases the rate of the reaction. There are more collisions as there are more particles in closer proximity when higher concentrations are present. Variable What factors? How they will be controlled Independent The amount of time taken between the changes of concentrations of sulphuric acid. Different concentrations of Sulphuric acid will be observed by diluting it with water in a 10ml measuring cylinder. Concentrations are changed for every 0.2 M concentrations. Dependent The amount of time for the reaction to take place until the marked cross disappears due to the cloudy being formed. The stopwatch will be started once the sulphuric acid is added immediately to the sodium thiosulphate. Controlled Temperature Pressure Catalyst Surface area Temperature of reaction is held under standard conditions: 298K. The pressure of this reaction will also be held under standard conditions of 1 atm. Catalyst - no catalyst is added to lower the activation energy of the reaction. ...read more.

Middle

* Add the two mixtures into the beaker, simultaneously. * Start timing immediately * Observe the marked spot under the beaker * When the reaction is finished, the cloudy mixture is present and the cross should not be able to be visible. That's when the stopwatch should be stopped * Record the time taken for this reaction to happen. * Do three trials for each set of concentrations * Repeat this whole process for 5 different concentrations of sulphuric acid. Method for effective controlling of variables: * Do this experiment under laboratory conditions * At room temperature (not fluctuating) * 1 atm pressure * Make sure no catalyst is added * Make sure the size of the beaker is the same because of keeping the same surface area of liquids during the reaction. Raw data of results time taken for reaction to happen (marked cross is not visible anymore) (+/- 0.5 seconds) Concentration of sulphuric acid (+/- 0.2ml) (M) trial 1 trial 2 trial 3 0.20 12.30 12.45 12.01 0.40 11.32 11.56 11.45 0.60 9.98 10.23 10.38 0.80 8.21 7.59 7.48 1.00 6.82 6.21 6.44 Qualitative data: When products are formed then the solution changes from colorless to cloudy yellow/white and the marked cross disappears. Processed Data Concentration of sulphuric acid (+/- 0.2ml) ...read more.

Conclusion

Improving the investigation In order to avoid these limitations and weaknesses, the experiment could have been improved. Knowing whether or not the reaction has stopped could be determined by light. If a light is shined through the beaker during a reaction and once the reaction changes color, the wavelengths could be measured through a device that would measure wavelength of light as they would change when the reaction has stopped from the colorless solution into a cloudy yellow/whitish. This is to be done so the reaction can be stopped without human perception. The number of trials that is repeated for this experiment should also be increased so that the raw data of results can give a more significant set of results that can show a relationship between rate and concentration to determine the order of the reaction. The concentrations of should be evaluated in smaller intervals such as concentrations between every 0.1M of sulphuric acid to make the results more valid. All other factors should be kept under control and measured before the experiment is conducted if this experiment was done. The assumptions that were made could have altered the rate of reaction. Temperature, pressure and surface are to be measured before hand and of course with no presence of a catalyst. ?? ?? ?? ?? 12.11.2008 Philip Mannas ...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. Investigate the rate of reaction of luminol in various factors. The objective was to ...

    Put 2 test tubes into a water bath. 3. Heat the water bath to a temperature of 30�C 4. Add the luminol to the H2O2 solution 5. Record the time for chemiluminescence. 6. Repeat the steps for several times.

  2. Aim: To study and investigate the effect of temperature on the rate of ...

    Place the conical flask in a water bath and heat the contents to a particular temperature. Record the temperature. 3. Place the flask on a white tile which is marked with a cross. 4. Immediately, add 5cm3 of hydrochloric acid to the heated solution.

  1. What is the rate equation of the reaction between sodium thiosulphate and hydrochloric acid?

    Volume of HCl /cm3 Concentration of Na2S2O3 /mol dm-3 5 1.0 4 0.8 3 0.6 2 0.4 1 0.2 Average of different trials for the time taken for an X drawn on a piece of paper and placed under the Erlenmeyer flask to become obscured by a solution with a

  2. Disappearing cross experiment

    The desk was whipped and any obstacles that could affect the experiment from being carried out without any disruptions. 1. Preparation for the reaction * Measured 20 cm3 (� 1,0 cm3) of sodium thiosulphate and poured it into the conical flask * Used a different measuring cylinder to measure 10 cm3(� 1,0 cm3)

  1. Chemistry extended essay - investigate the effect of 2-bromo-2-methyl propane concentration and temperature of ...

    5- Using a graduated cylinder measure 67 ml of distilled water added to an Erlenmeyer flask #4. 6- Add two drops of Bromo-phenol blue indicator to flask #4. A, a, II:- 1- Add quickly the solution in Erlenmeyer flask #4 to solution in flask #3 and start the stop watch to count for time in seconds.

  2. Surface area vs Rate of Reaction

    33.5 27.3 90 32.0 21.2 36.5 29.9 100 35.0 23.0 36.5 31.5 110 35.0 24.5 39.2 32.9 120 38.0 26.0 42.0 35.3 130 40.0 28.0 45.5 37.8 140 41.0 30.0 47.0 39.3 150 44.0 30.0 47.0 40.3 160 46.0 31.0 49.0 42.0 170 49.0 34.5 50.0 44.5 180 50.0 36.0

  1. The rate of reaction between sodium thiosulfate and hydrochloric acid

    Wash out the flask thoroughly. 9. Repeat the experiment using other volumes of sodium thiosulfate and water in the table next page. Volume of sodium thiosulfate 0.10 M (� 0.0500 ml) Volume of water (� 0.0500 ml) Volume of hydrochloric acid (� 0.0500 ml)

  2. Investigating Factors that Affect the Rate of Reaction of the Decomposition of Hydrogen ...

    has been filled in for each trial from each and calculate the average reaction rate (kPa sec-1) of the decomposition of H2O2 that occurred over 3 minutes for each part and put it into the analysis table Insert the concentration of H2O2 and yeast from each part into the analysis table as well.

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