The vacuum effect of a filter flask is used to filter laboratory samples. A filter flask is an Erlenmeyer flask with a specialized arm on the side. This arm connects to a vacuum pump or aspirator, creating a vacuum and lowering the pressure inside the flask.Know More
These flasks are used for filtering samples because the vacuum forces the filtrate into the flask, while residue remains on the filter paper in the funnel. The funnel used for filtration is called a Buchner funnel. This funnel and a stopper can both be used to maintain the vacuum in the flask; a trap is used to prevent water from the aspirator from entering the flask and contaminating the filtrate.
Filter flasks are also called vacuum flasks, Buchner flasks, side-arm flasks and Kitasato flasks. The name Buchner flask is for its inventor, the German chemist Ernst Buchner. Ernst Buchner's patents for the filter flask and its accompanying funnel date back to 1888. The name Kitasato flask references bacteriologist Shibasaburo Kitasato, the co-discoverer of bubonic plague bacteria.
Filter flasks are produced with heavier walls than standard Erlenmeyer flasks to withstand these pressure changes without imploding. This heavier glass makes filter flasks more expensive than comparable pieces of laboratory glassware.Learn more about Chem Lab
Also known as an Erlenmeyer flask, a conical flask is a glass vessel used in chemistry laboratories, and it has a wide flat bottom that tapers up into a narrow cylindrical neck. They're usually used for mixing liquids.Full Answer >
Distilling flasks are glass flasks used to separate mixtures by distillation. A distillation flask has three parts: a spherical base, a cylindrical neck and sidearm that is connected to the flask neck. Distillation is the process of separating components of a mixture based on differences in the components' boiling points.Full Answer >
A volumetric flask is glassware used in laboratories for measuring volume in the preparation of solutions and holds a precise amount of liquid material when at room temperature. These flasks are calibrated using global standards and come in sizes up to 10,000 milliliters.Full Answer >
Fluted filter paper is a circular piece of filter paper folded in an accordion style and used to filter solid impurities from a liquid during gravity filtration. The fluting of the paper increases the surface area of the filter.Full Answer >