Conical Elernmeyer Flask
-
Upload
hamadadodo7 -
Category
Documents
-
view
8 -
download
3
description
Transcript of Conical Elernmeyer Flask
This week we are launching Wikivoyage . Join us in creating a free travel guide that anyone can edit.
Erlenmeyer flaskFrom Wikipedia, the free encyclopediaJump to: navigation, search For the episode of The X-Files, see The Erlenmeyer Flask.
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2012)
Erlenmeyer flask
Different Erlenmeyer flasks
Original drawing of the Erlenmeyer flask
Conical flask used in a Titration setup
An Erlenmeyer flask, also known as a conical flask, is a widely used type of laboratory flask which features a flat bottom, a conical body, and a cylindrical neck.[1] It is named after the German chemist Emil Erlenmeyer, who created it in 1861.[2][3]
Contents 1 Design 2 Uses 3 See also 4 References 5 External links
DesignThe Erlenmeyer is usually marked on the side (graduated) to indicate the approximate volume of contents, and has a spot of ground glass or enamel where it can be labeled with a pencil. It differs from the beaker in its tapered body and narrow neck.[4]
The opening usually has a slight rounded lip so that the Erlenmeyer can be easily stoppered using a piece of cotton wool, rubber bung or similar. Alternatively, the neck may be fitted with a female ground glass joint to accept a glass stopper. The conical shape allows the contents to be swirled or stirred during an experiment, either by hand or by a shaker; the narrow neck keeps the contents from spilling out. The small neck reduces evaporative losses compared to a beaker, while the flat bottom of the conical flask makes it unlikely to tip over and spill.
UsesErlenmeyers are used in chemistry labs for titration, e.g. for pH, as they can be held and the contents mixed single-handed leaving the other hand free to add reagent.[5]
Erlenmeyer flasks are suitable for heating liquids, e.g. with a Bunsen burner. The flask is usually placed on a ring held to a ring stand by means of a ring clamp. A wire gauze mesh or pad is usually placed between the rings and the flask to prevent the flames from directly touching the glass in the same manner as for a beaker. When heating (or cooling) in a water bath the flask can be clamped by the neck to a stand or a hooped weight may be placed over the conical part of the flask to prevent it from floating in the bath.[6][better source needed]
Erlenmeyers are also used in microbiology for the preparation of microbial cultures. Plastic Erlenmeyer flasks used in cell culture are pre-sterilized and feature closures and vented closures to enhance gas exchange during incubation and shaking.
See also Fleaker
References1. ̂ Flasks. IndiaMART. 17 November 20112. ̂ Erlenmeyer Flask. 17 November 20113. ̂ Erlenmeyer Flask. Lab Bench. 17 November 20114. ̂ Laboratory Glassware. 17 November 20115. ̂ Erlenmeyer Flask. The Titi Tudorancea Learning Center. 17 November 20116. ̂ https://eee.uci.edu/programs/gchem/RDGvolflaskpipet.pdf
External links Media related to Erlenmeyer flask at Wikimedia Commons
[hide]
v t e
Laboratory equipmentGlassware Beaker
Boston round (bottle) Büchner funnel Burette Cold finger Condenser Conical measure Cuvette Dean-Stark apparatus Dropping funnel Eudiometer Evaporating dish Gas syringe
Graduated cylinder Pipette Petri dish Pycnometer Separatory funnel Soxhlet extractor Ostwald viscometer Watch glass
Flasks
Büchner Dewar Erlenmeyer Fernbach Fleaker Florence Retort Round-bottom Schlenk Volumetric
Tubes
Boiling Ignition NMR Test Thiele Thistle
Other Agar plate Aspirator Autoclave Biosafety cabinet Bunsen burner Calorimeter Chemostat Colony counter Colorimeter Laboratory centrifuge Crucible Eyewash Fire blanket Fume hood Glove box Homogenizer Hot air oven Incubator Laminar flow cabinet Magnetic stirrer Meker-Fisher burner Microscope
Microtiter plate Picotiter plate Plate reader Retort stand Safety shower Spectrophotometer Static mixer Stir bar Stirring rod Stopper Scoopula Teclu burner Thermometer Vacuum dry box Vortex mixer Wash bottle
See also: Instruments used in medical laboratories
Help improve this pageWhat's this?
Did you find what you were looking for?
Yes No Categories:
Laboratory glassware
Navigation menu Create account Log in
Article Talk
Read Edit View history
Main page Contents Featured content
Current events Random article Donate to Wikipedia
Interaction
Help About Wikipedia Community portal Recent changes Contact Wikipedia
Toolbox
Print/export
Languages
العربية Català Česky Dansk Deutsch Ελληνικά Español Euskara فارسی Français 한국어 Hrvatski Italiano Magyar Македонски Nederlands Norsk (bokmål) Norsk (nynorsk) Polski Português Română Русский Simple English Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska Tagalog தமிழ் Українська 中文
This page was last modified on 28 December 2012 at 15:49. Text is available under the Creative Commons Attribution-ShareAlike License;
additional terms may apply. See Terms of Use for details.Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Contact us
Privacy policy About Wikipedia Disclaimers Mobile view