2CLabManual201303

Figure 3 liquid transfer 4 capping a flask during

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Unformatted text preview: Transfer 3. Handling Liquids When transferring liquids from a reagent bottle, always remove the cap/stopper and hold it in your hand. Never place the cap/stopper on the bench or contamination could result. Pour the liquid slowly and carefully to avoid spillage. You may find the use of a glass rod helpful, as is shown below in Figure 3. Figure 3: Liquid Transfer 4. Capping a Flask During many experiments you will have to cap a flask to protect the contents from contamination. Figure 4 illustrates the proper method using Parafilm. Figure 4: Capping a Flask 5. Measuring Liquid Volumes Many glassware items have volume marks printed on them. Before using a piece of glassware to make a volume measurement, you should take a moment to study its calibrations to insure that you know how to read them properly. A beaker or Erlenmeyer flask can be used for rather rough measurements. A graduated cylinder of the appropriate size can be used for measurements of moderate accuracy. A pipet is commonly used to transfer an accurately known volume of a liquid from one container to another. However, the accuracy of such a...
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This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.

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