A Microscale Approach to Organic Laboratory Techniques (5th by Donald L. Pavia, Gary M. Lampman, George S. Kriz, Randall G.

By Donald L. Pavia, Gary M. Lampman, George S. Kriz, Randall G. Engel

From biofuels, eco-friendly chemistry, and nanotechnology, this confirmed laboratory textbook offers the up to date assurance scholars desire of their coursework and destiny careers. The book's experiments, all designed to make use of microscale glassware and kit, disguise conventional natural reactions and syntheses, the isolation of traditional items, and molecular modeling and contain project-based experiments and experiments that experience a organic or well-being technological know-how concentration. up to date all through with new and revised experiments, new and revised essays, and revised and elevated options, the 5th variation is prepared in response to essays and issues of present curiosity.

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Extra resources for A Microscale Approach to Organic Laboratory Techniques (5th Edition)

Sample text

Figure 6 Use of an automatic pipette. Touch tip on side, depress to first detent to release liquid. Pause, depress to second detent. © Cengage Learning 2013 Automatic Pipettes EXPERIMENT 1 ■ Introduction to Microscale Laboratory 7 1. Select the desired volume by adjusting the micrometer control on the pipette handle. 2. Place a plastic tip on the pipette. Be certain that the tip is attached securely. 3. Push the plunger down to the first detent position. Do not press the plunger to the second position.

Optional Exercise See “Optional Exercise” in Experiment 3A. 6 Your goal will be to find a good solvent for crystallizing the sample. You should try water, methyl alcohol, and toluene. After you have determined which is the best solvent, crystallize the remaining material. Finally, determine the melting point of the purified compound and of the impure sample. 6 with three separate samples of impure fluorene. Use the following solvents: methyl alcohol, water, and toluene. 5 An alternative method for inducing crystallization is to dip a microspatula into the solution.

Label the test tubes and then add 1 mL of water to the first tube, 1 mL of methyl alcohol to the second tube, and 1 mL of hexane to the third tube. The fourth tube will serve as a control. Determine the solubility of each sample in the following way: Using the rounded end of a ­microspatula (the larger style, in Figure 10 in Experiment 1, Introduction to Microscale Laboratory), stir each sample continuously for 60 seconds by twirling the spatula rapidly. If a solid dissolves completely, note how long it takes for the solid to dissolve.

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