In your equipment set up (or any of the others), the heating ... steps in the diagram) and this cannot be accomplished using a simple distillation apparatus. It consists of a round bottom flask, a reflux condenser (water-jacketed) and heating source (here: heating mantle). • Clamp the reflux condenser to the iron stand in the upright position. Chem 144 and Chem 174. Chemistry Laboratory Glassware A Florence flask or boiling flask is a round-bottom borosilicate glass container with thick walls, capable of withstanding temperature changes. They typically do not have markings (other than a mark approximating maximum volume) or pour spouts. The picture below shows a reflux setup for a macro-scale experiment used in upper division laboratories e.g. A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. The picture on the right side shows the flask with a matching heating mantle and a stirring bar. One example of a flat-bottomed flask used in the laboratory is the Erlenmeyer flask. A flat-bottomed flask is used in a chemistry laboratory for experiments that involve collecting and measuring liquids, mixing solutions and cultivating media. 24/40 joint, with two hose connections. Fractional distillation is the separation of a mixture into its component parts, or fractions. Diagram of simple distillation set-up without a fractionating column often used by chemists. You should lightly grease all joints in your setup unless they are still greasy from previous usage. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize.It uses distillation to fractionate.Generally the component parts have boiling points that differ by less than 25 °C (45 °F) from each other under a pressure of one atmosphere. Be sure to clamp both the round bottom boiling flask and the collection flask. The picture on the left shows the basic reflux setup consisting of are heating mantle, a round bottom flask, a Liebig condenser used in reflux mode and a gas adapter on top. Below is a diagram of assemby: Generally, boiling stones or a magnetic stirbar will be added to the boiling flask to ensure even boiling. Cap. Make sure the glass joints are lightly greased with silicon. Set up a distillation apparatus according to the diagram below. Clamp the 50 mL round-bottom flask (the pot) at least a foot above the floor of the hood and construct a fractionating column by packing a condenser with steel wire or glass wool. Round bottom or boiling flasks do not stand up on their own and must always be held by a clamp. They can be heated by Bunsen burner, or by a special type of hot plate that is made to accommodate the round bottom. 1. heat source (a Bunsen burner here) 2. distilling flask (a round bottom flask) 3. distilling head 4. thermometer 5. condenser 6. cooling water in 7. cooling water out 8. receiving flask … round bottom flask. Flat-bottomed flask A flask with similar uses as the round-bottom flask, but the flat bottom allows it to stand on a level surface. The design and construction of the flat-bottomed flask allows it to stand alone on the lab bench. ; Florence flasks are similar flasks that have round bodies and either a round bottom or a flat bottom so that one can stand the flask on a level surface. Round-bottom flasks • Jacketed round-bottom flasks • Round-bottom distilling flasks • Pear shaped flasks • Recovery flasks ... Jacketed round-bottom flasks S.T. ORGANIC LABORATORY TECHNIQUES 10 10.1 ... being used to heat the round bottom flask.

Shown in use.

Nick Koudis/Getty Images A Florence flask or boiling flask is a round-bottom borosilicate glass container with thick walls, capable of withstanding temperature changes. 3) Setting up the tubes • Connect one end of one rubber tubing with the water tap and the other end with the bottom interface of the reflux condenser. Knocking over your collection flask at the end of the experiment if VERY frustrating.