Vacuum flask - Wikipedia
A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that slows the speed at which its contents change in temperature. It greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings by trying to be as adiabatic as possible.
Types of Chemistry Flasks: A Complete Guide
Mar 5, 2020 · Büchner flask with a funnel and vacuum system. • Round-Bottom Flask: This is probably one of the most common types of chemistry flasks. Ball-like container with a wide base and narrow neck that has a stopper. It is used when the substances contained must be stirred, avoiding spillage and evaporation of gases.
Büchner flask - Wikipedia
A Büchner flask, also known as a vacuum flask, [1] filter flask, suction flask, side-arm flask, or Bunsen flask, is a thick-walled Erlenmeyer flask with a short glass tube and hose barb protruding about an inch from its neck.
1.5D: Suction Filtration - Chemistry LibreTexts
Suction filtration (vacuum filtration) is the standard technique used for separating a solid-liquid mixture when the goal is to retain the solid (for example in crystallization).
D Setup of vacuum filtration - Chemistry LibreTexts
Jun 17, 2023 · Vacuum filtration is a technique for separating a solid product from a reaction mixture. The mixture is passed through filter paper in a Buchner funnel. The solid is trapped by the filter and the liquid is drawn through the funnel into the flask below.
Vacuum Filtration - Chemistry LibreTexts
Care must be taken not to use such a strong vacuum that the filter paper rips (in which case all the solid will be lost back into the solvent) or in extreme cases the glass flask breaks. Suction filtration is used in recrystallisation experiments.
A Visual Guide to Chemistry Glassware - Compound Interest
Mar 17, 2015 · Finally, the Claisen flask, designed by chemist Ludwig Claisen, is designed for vacuum distillation; distillation under vacuum produces problematic amounts of bubbles when solutions are boiled. Claisen’s flask includes a capillary tube that inserts small bubbles into the liquid, easing the ferocity of boiling, whilst the branched portion of ...
How do Thermos vacuum flasks work? - Explain that Stuff
Aug 8, 2023 · Vacuum flasks are a bit like people in this respect: they like to keep things at steady temperatures. If you put hot drinks in them, they keep them hot; if you put cold drinks in them, they keep them cool. They're simple, neat, and effective—but how exactly do they work? Photo: A typical Thermos® vacuum flask.
There are several filtration methods : simple or gravity, hot and vacuum filtrations. The selection of the appropriate method is typically dictated by the nature of the experimental situation.
Vacuum filtration | Resource - RSC Education
When a solid needs to be isolated from a solution it is normally done at a reduced pressure using a Buchner flask and Buchner funnel.