What is Büchner flask?
[[Image:Buchner Flask.PNG|thumb|A Büchner flask]] A '''Büchner flask''' (also called a vacuum flask, a filter flask, a side-arm flask or a kitasato flask) is a flask made of glass. == Structure == A Büchner flask has thick walls so that a pressure change will not break it. It has a hole in the top where a [[Büchner funnel]] can be put and a small tube in the side where a [[vacuum]] can be attached. The small tube has barbs on it so that the vacuum will not weaken. == Uses == A Büchner flask can be used with a [[Büchner funnel]] for separating solids and liquids. Water is poured into the Büchner funnel and the liquid passes through filter paper and is sucked up by a vacuum attached to the side of the Büchner flask, while the solid stays behind in the Büchner funnel. The Büchner flask can also be used as a vacuum trap in a vacuum line to ensure that no fluids are carried over from the aspirator or vacuum pump (or other vacuum source) to the evacuated apparatus, or vice versa. == History == It is commonly thought to be named after the Nobel Laureate, Eduard Buchner, but it is actually named after the industrial chemist Ernst Büchner. ==Related pages== * [[Büchner funnel]] ==Other websites== * [http://www.labdepotinc.com/category_details~id~303.aspx A Büchner funnel manufacturer] {{Webarchive|url=https://web.archive.org/web/20070714213318/http://www.labdepotinc.com/Category_Details~id~303.aspx |date=2007-07-14 }} * [http://www.alken-murray.com/Buchlfunnel.html Experiment using Büchner funnels] * [http://www.thesciencefair.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=BF More examples of Büchner funnels] {{LaboratoryEquipment}} {{DEFAULTSORT:Buchner Flask}} [[Category:Laboratory equipment]]