IODINE CLOCK EXPERIMENT COURSEWORK

IODINE CLOCK EXPERIMENT COURSEWORK

Please enable JavaScript to access the full features of the site or access our non-JavaScript page. Sodium thiosulfatewater, Na 2 S 2 O 3. Answers Clock Iodine lab Reaction. Lesson organisation This demonstration can be used at secondary level as an introduction to some of the ideas about kinetics. This is one of a number of reactions loosely called the iodine clock. Please help us feed and educate children by uploading your old homework! Solution A is made up as follows:

As described this is intended as a demonstration, best done on a large scale for the most visual impact. Also, when the tube was taken out the bath tub the room temperature immediately affected it, constantly changing the final reaction. Scaling up the volumes of solution that are mixed may help in a large room. The demonstration itself takes less than 1 minute. There is no warning of when the blue colour is about to appear. Iodine clock reaction Experiment. A solution of hydrogen peroxide is mixed with one containing potassium iodide, starch and sodium thiosulfate.

Solids, liquids and gases.

iodine clock experiment coursework

For a student investigation, the quantities required would be smaller but volumes then need to be measured quite accurately with, for example, disposable doursework syringes. Lesson organisation This demonstration can be used at secondary level as an introduction to some of the ideas about kinetics.

Both solutions are colourless although solution A will be slightly cloudy.

Iodine Clock Reaction Lab Answers

You do not have JavaScript enabled. Lastly a limitation in part B is that a final temperature for the solution could not be measured because of all of the surrounding clofk such as holding the tube would have transferred heat to the solution.

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The final rate law determined was:. Also, when the tube was taken out the bath tub the room temperature immediately affected it, constantly changing the final reaction. The demonstration f Measure cm 3 of solution A and cm 3 of solution B in separate cm 3 measuring cylinders.

iodine clock experiment coursework

coursewoork Conclusions that can experimenr drawn from the data is that when the concentration of the potassium iodate solution was increased the rate of reaction decreased. A limitation in part A would have been that the stirring would have affected the time it took for the solution to turn blue. A solution of hydrogen peroxide is mixed with one containing potassium iodidestarch and sodium thiosulfate.

Stir until all the solids have dissolved and allow to cool to room temperature. To avoid this the acid and sodium thiosulfate are separated in solutions A and B. Some of the tubes may have gotten more stirred than others and this would have caused an inaccuracy in the times that were collected.

Answers Clock Iodine lab Reaction. Better collection techniques such as spectrometry should have been used because then when ion changed colour it would be detected right away. Solution B is made up as follows: Pour onto this approximately cm 3 of boiling water and stir.

Iodine clock reaction- Learn Chemistry

Our new website is coming soon. It is assumed that the order of reaction with respect to the bisulfate is zero, thus n is zero. Solution A Note 1: Eye protection Balance 1 or 2 d. A chemical stop-clock – iodine clock reaction Rates and rhubarb.

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The Iodine Clock Investigation

Ensure thorough iodind with a stirring rod or magnetic stirrer. As described this is intended as a demonstration, best done on a large scale for the most visual impact. This is one of a number of reactions loosely called the iodine clock. This collection of over practical activities demonstrates a wide range of chemical concepts and processes.

Iodine Clock Reaction Lab Answers – SchoolWorkHelper

In conclusion, from part A the order of reaction of the iodate was found to be 2. This demonstration can be used at secondary level as an introduction to some of the ideas about kinetics.

In part B the activation energy was experiemnt to iodne Also some solutions turned blue right away and others took a while so they could be seen by the human eye. Description A solution of hydrogen peroxide is mixed with one containing potassium iodide, starch and sodium thiosulfate.

As well another way that the procedure can be improved upon is to perform the lab like a titration lab using a burette, flask and the indicator. Schoolworkhelper Editorial Team https: It only takes seconds!