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5.Place the Erlenmeyer flasks from steps 3 and 4 in the constant-temperature water bath, which has been previously set to atemperature of about 50C. Allow the flasks to remain in the bath forat least 10 minutes to equilibrate. During this time proceed to step 6.
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Chapter 14 / Exercise 14.73
Chemistry: Principles and Practice
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Experiment D2LABORATORY MANUAL616.Repeat steps 2 through 4. Place these two flasks in the water bath thathas been set at 35C. Allow the solutions to equilibrate for at least 10minutes, and in the meantime proceed to step 7.7.Repeat steps 2 through 4. Place these two flasks in a bath (e.g., alarge crystallizing dish) containing ice water. Allow the solutions toequilibrate for at least 10 minutes. During this time, proceed withstep 8.8.Repeat steps 2 through 4. Place a thermometer in the reaction vessel,and quickly pour the contents of the 50-mL Erlenmeyer flask into thevessel. Start the stopwatch the instant the two solutions are mixed(see Figure D1.2, particularly if you have not yet done Experiment D1).Record both how long it takes for the permanent blue-black colour todevelop, and the temperature of the reaction mixture.9.By now, the solutions contained in the flasks that were placed in thefirst water bath (see step 5) should have attained a temperature ofabout 50C. Place a thermometer in the reaction vessel and, keepingthe reaction vessel in the water bath, quickly start the reaction asdescribed in step 8. As before, record both the time it takes for thepermanent blue-black colour to develop, and the temperature of thereaction mixture.10.Repeat step 8 using the solutions contained in the flasks that areequilibrating at about 35C (see step 6).Note:Clean the thermometercarefully between runs.11.Repeat step 8 using the solutions contained in the flasks that areequilibrating in the ice water bath (see step 7).WASTE DISPOSAL:The solutions used in this experiment may be washeddown the drain with large amounts of water. Wash the Erlenmeyer flaskswith soap and water, then rinse with distilled water followed by acetone.Waste acetone should be placed in the special container provided.
CHEMISTRY 21862Results and CalculationsCheck to see if this is one of the experiments that has been assigned to youfor a formal report. If it is, you may wish to review the section of theLaboratory Manualentitled “Writing Laboratory Reports.” Note that even ifyou carry out this experiment before doing Experiment D1, you will not beable to complete the necessary calculations without having first completedthe calculations from the earlier experiment. If, for some reason, yourinstructor has decided that you should omit Experiment D1, she/he willprovide you with the information needed in order to complete thesecalculations.1.For each of the four runs carried out in this experiment, determinethe rate of reaction as described in steps 1 through 5 in the “Resultsand Calculations” section of Experiment D1, Part B. Use the rate lawdetermined in step 8 of the same section to determine the value of therate constant,k

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Chemistry, Sodium hydroxide
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Chemistry: Principles and Practice
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Chapter 14 / Exercise 14.73
Chemistry: Principles and Practice
Reger Chem
Expert Verified

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