IODINE CLOCK EXPERIMENT COURSEWORK

The demonstration f Measure cm 3 of solution A and cm 3 of solution B in separate cm 3 measuring cylinders. Pour onto this approximately cm 3 of boiling water and stir. In conclusion, from part A the order of reaction of the iodate was found to be 2. The slope represents the order of reaction with regards to the iodate, but the actual value is 2. See Technician notes about using dilute ethanoic acid as a less hazardous alternative Both solutions are colourless although solution A will be slightly cloudy.

The slope represents the order of reaction with regards to the iodate, but the actual value is 2. 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. Solids, liquids and gases. Instead of the iodate ion concentration being changed the concentration of the bisulfate could have been changed by making it the limiting reactant in the balanced equations. The effect of concentration and temperature on reaction rate. A solution of hydrogen peroxide is mixed with one containing potassium iodide , starch and sodium thiosulfate.

Also, when the tube was taken out the bath tub the room temperature immediately affected it, constantly changing the final reaction.

The Iodine Clock Investigation

In search of more solutions: Teaching notes Visual tips: Our new website is coming soon. The basic reaction is: Description A solution of hydrogen peroxide is mixed with one containing potassium iodide, starch and sodium thiosulfate.

  THESIS KULEUVEN BIO INGENIEUR

Sample calculation for the rate constant, k for Rate 1 Again C1 stays the same for all calculations. Pour onto this approximately cm 3 of experimdnt water and stir. Please help us feed and educate children by uploading your old homework!

Jump to main content. A Future in Chemistry. 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.

See Technician notes about using dilute ethanoic acid as a less hazardous alternative. This demonstration can be used at secondary level as an introduction to some of the ideas about kinetics.

It can be used to stimulate discussion about what factors affect the rate of reaction. Additional notes 1 Hydrogen peroxide is capable of oxidising thiosulfate ions to tetrathionate ions but the reaction is too slow to affect this demonstration.

A solution of hydrogen peroxide is mixed with one containing potassium iodidestarch and sodium thiosulfate.

Iodine Clock Reaction Lab Answers – SchoolWorkHelper

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. We will then predict from our results the correc As well another way that the procedure can be improved upon is to perform the lab like coursewlrk titration lab using a burette, flask and the indicator.

  DPS JALANDHAR HOLIDAYS HOMEWORK FOR CLASS 10

Eye protection Balance 1 or 2 d. Solution A Note 1: A chemical stop-clock – iodine clock reaction Rates and rhubarb. The slope represents the order of reaction with regards to the iodate, but the actual value is 2.

iodine clock experiment coursework

After a few seconds the colourless mixture suddenly turns dark blue. Answers Clock Iodine lab Reaction.

This collection of over practical activities demonstrates a wide range of chemical concepts and processes. 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

The demonstration itself takes less than 1 minute. It also makes a useful starting-point for a student investigation.

iodine clock experiment coursework

The effect of concentration and temperature on reaction rate. Procedure Solution A ckursework made up as follows: 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. This is one of a number of reactions loosely called the iodine clock.