IODINE CLOCK EXPERIMENT COURSEWORK

Teaching notes Visual tips: Conclusions that can be drawn from the data is that when the concentration of the potassium iodate solution was increased the rate of reaction decreased. All throughout the lab the assumption that is made throughout the lab is that the bisulfate ion has a reaction order of zero. A chemical stop-clock – iodine clock reaction. It may help understanding if the students are already familiar with the reactions of starch and iodine, and iodine and sodium thiosulfate, so it may be worth demonstrating these beforehand. Better collection techniques such as spectrometry should have been used because then when ion changed colour it would be detected right away. See Technician notes about using dilute ethanoic acid as a less hazardous alternative Both solutions are colourless although solution A will be slightly cloudy.

In part B the activation energy was found to be Stir until all the solids have dissolved and allow to cool to room temperature. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. In conclusion, from part A the order of reaction of the iodate was found to be 2. It can be used to stimulate discussion about what factors affect the rate of reaction. We will then predict from our results the correc

As described this is intended as a demonstration, best done on a large scale for the most visual impact. It only takes seconds! Stir until all the solids have dissolved and allow to cool to room temperature.

Iodine Clock Reaction Lab Answers – SchoolWorkHelper

This is one of a number of reactions loosely called the iodine clock. Sodium thiosulfatewater, Na 2 S 2 O 3. Lesson organisation This demonstration can be used at secondary level as an introduction to some of the ideas about kinetics.

  IOE THESIS BINDING

iodine clock experiment coursework

Teaching notes Visual tips: It may help understanding if the students are already familiar with the reactions of starch and iodine, and iodine and sodium thiosulfate, so it may be worth demonstrating these beforehand.

Ensure thorough mixing with a stirring rod or magnetic stirrer. The experiment should have been done both ways to have the most accurate results. In search of more solutions: Solids, liquids and gases. As soon as the iodine is formed, it reacts with the thiosulfate to form tetrathionate ions and recycles the iodide ions by the fast reaction: Iodine clock reaction Experiment.

The order of reaction with respect to the iodate ion, mmust be determined for the following rate. The demonstration itself takes less than 1 minute. After a few seconds the colourless mixture suddenly turns dark blue.

iodine clock experiment coursework

Another relationship that can be seen between the rate constant and the temperature is that as the temperature increased the rate constant increased as well. Our new website is coming soon. See Technician notes about using dilute ethanoic acid as a less hazardous alternative. You do not have JavaScript courseork.

Iodine Clock Reaction Lab Answers

Better collection techniques such as spectrometry should have been used because then when ion changed colour it would be detected right away. If the demonstration is being done for entertainment, the imaginative teacher will be able to think up some suitable patter.

Clck soon as all the thiosulfate is used up, free iodine or, strictly, I 3 – ions remains in solution and reacts with the starch to form the familiar blue-black complex. A chemical stop-clock – iodine clock reaction.

  BACHELOR THESIS TECHNISCHE BEDRIJFSKUNDE

The effect of concentration and temperature on reaction rate. All throughout the lab the assumption that is made throughout the lab is that the bisulfate ion has a reaction order of zero. The demonstration f Measure cm 3 of solution A and cm 3 of solution B in separate cm 3 measuring cylinders.

The Iodine Clock Investigation

Conclusions that can be drawn from the data is that clpck the concentration of the potassium iodate solution was increased the rate of reaction decreased. Also, when the tube was taken out the bath tub the room temperature immediately affected it, constantly changing the final reaction. Please enable JavaScript to access the full features of the site or access our non-JavaScript page. Apparatus Chemicals Eye protection Balance 1 or 2 d. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures.

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.

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