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Unformatted text preview: Working with Chemicals and Apparatus
Following these recommendations will help make your work easier and equipment use
● Plan your work before starting a laboratory procedure. Be sure you know what to do if
you or another laboratory worker has an accident.
● Keep your workspace free of clutter.
● Set up clean, dry apparatus, firmly clamped and away from the edge of the lab bench,
paying attention to the proximity of reagent bottles to burners and to other workers
and their equipment. Choose sizes that can properly accommodate the operation to
be performed, allowing at least 20% free space.
● Except for glass tubing, stirring rods, and graduates, use borosilicate glassware (e.g.,
Pyrex). Examine your glassware closely for flaws such as cracks and chips. Damaged
glassware should be repaired (see your instructor) or discarded in a waste container
labeled for broken glass.
● Other equipment also should be free of flaws such as cracks, chips, frayed wire, and
obvious defects. Check with your instructor if you have questions.
● A properly placed pan under a reaction vessel or container will act as a secondary
containment to confine spilled liquids in the event of glass breakage.
● Use shields when working with reactive mixtures. Place the shields in suitable positions to protect yourself and others. Be sure that the shields are stabilized with weights
or fasteners so that they cannot be knocked over. Also wear both eye and face protection when using shields.
● When working with flammable gases or liquids:
■ Do not allow burners or other ignition sources in the vicinity unless your instructor
■ Use appropriate traps, condensers, or scrubbers to minimize release of material to
■ If you will be using a hot plate or heating mantle, do not proceed with your laboratory work until you know the autoignition temperatures of the chemicals likely to
be released and can ensure that the temperatures of all exposed surfaces...
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- Spring '07