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Unformatted text preview: addition, such a small volume of liquid can be inaccurate in a graduated cylinder due the meniscus effect and liquid sticking to the walls of a graduated cylinder. The pipette is a smaller container and therefore is not affected by these two problems as harshly. Weighing the solvent using a graduated cylinder would take extra steps, because the student would have to convert the weight of the liquid to volume using the solvents density. Each step would unavoidably have human error, which would be compounded if a student were to weigh the liquid. 3. 4. A student should use a new Pasteur pipette each time he/she uses a different solvent because different solvents chemically react and can affect the results of the experiment. If for example, HCL and NaOH were used in the same pipette, the solvent in the pipette would be neutralized to some extent and would not yield accurate results. 5....
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- Spring '08