lab 1 discussion - E xperiment One: Calibrating a Pasteur...

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Experiment One: Calibrating a Pasteur Pipette In experiment one calibrating a Pasteur pipette, the student’s goal was to learn how to estimate liquid volume using a Pasteur Pipette and to understand the difference between liquid volume and liquid weights. In the first part of the lab students first poured .5 mL of water into a graduated cylinder and then drew the water back into their pipette. By doing this, students got to experience and visualize how much volume .5 mL of water is in relation to their pipette. The students then proceeded to attempt to draw up .5 mL of water without having put it in a graduated cylinder prior. The goal was to repeat these steps until the students had successfully drawn up .5 mL with their pipette for three trials in a row. It took the student four trials. During the first trial the student only drew up .25 mL of water with his pipette. After seeing that he did not draw up enough water, it was easy for the student to make the correct adjustments. After completing these steps the
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This note was uploaded on 09/18/2011 for the course CHEM 3AL taught by Professor Li during the Spring '08 term at University of California, Berkeley.

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lab 1 discussion - E xperiment One: Calibrating a Pasteur...

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