Because beakers can only provide a rough estimation, the preferred instruments of choice for obtaining precise scientific measurements are graduated cylinders and volumetric flasks. Beakers contain markings on their sides to indicate different volume measurements, similar to common measuring cups. For example, tall Berzelius beakers make convenient titration tools. As a general caching library, Beaker can handle storing for various times any Python object that can be pickled with optional back-ends on a fine-grained basis. They are called beakers because of their small pour spouts, or beaks, located at the lip of each container.īeakers are manufactured in a range of sizes, from tall and thin to short and stout. Beaker is a web session and general caching library that includes WSGI middleware for use in web applications. Wikipedia notes that they can also come in other materials, such as stainless steel, aluminum, polythene, polypropylene and polytetrafluoroethylene.
Beakers are usually made of borosilicate glass to prevent sudden cracking and splitting under fluctuating temperature extremes. Only use appropriately labeled spatulas for each reagent bottle. 2) Pour from the beaker into a graduated cylinder to within 0.1 ml of the desired amount, adding the last drop with an eyedropper filled from a beaker.
Anne Marie Helmenstine for explains that the flat bottoms on beakers make them convenient tools to place on hot plates without falling over. Pour from the reagent bottle into a beaker and draw up the liquid into a pipet from the beaker.
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