Chemical glassware

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Revision as of 18:29, 19 February 2007 by imported>Paul Derry (Volumetric Flasks)
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This article contains a photographic list and brief description of the purpose, benefits, and problems that various pieces of laboratory glassware. The items listed here may be moved to their own separate articles at some point in the future, however, for the time being, this will do.

General

Most laboratory glassware is constructed of heat and chemical resistant Pyrex glass so that it can be used for a variety of different purposes and not pose a serious threat to contaminating the reagents held inside. Some of the glassware seen in a chemistry lab also appears in most other laboratory settings.

Volumetric Flask

1000mL, 500mL, 25mL Volumetric Flasks

The Volumetric Flask is used to dilute a very specific volume of a solution. Each flask is calibrated to hold a certain volume and only that certain volume. Once the reagents in the solution have been added, the flask is then filled to the calibration line, a small etching around the neck of the flask that was established when the flask was manufactured, with the solvent and the flask shaken to ensure a homogeneous solution. Due to the specific calibration mark and a general lack of other markings, these flasks are useless in dispensing an arbitrary volume of solution and thus are only used to make solutions.