Erlenmeyer Flask

Erlenmeyer Flask

The Erlenmeyer flask, also known as a conical flask or titration flask, is a type of laboratory flask which features a flat bottom, a conical body, and a cylindrical neck. It is named after the German chemist Emil Erlenmeyer, who designed it in 1860. This flask is widely used in chemistry and biology laboratories for mixing, heating, and storing liquids.

Design and Features

The unique design of the Erlenmeyer flask offers several advantages in laboratory settings. The conical shape allows for easier mixing of contents by swirling, without the risk of spillage, which is higher in cylindrical-shaped flasks. The narrow neck can be easily stoppered with cotton, rubber, or glass stoppers. This design also allows for the use of a clamp or stand to hold the flask during various laboratory procedures. Erlenmeyer flasks are made from glass or plastic, with glass being preferable for heating applications due to its resistance to high temperatures and chemical erosion.

Uses

Erlenmeyer flasks are versatile tools in the lab. They are commonly used for:

• Mixing solutions by swirling
• Heating and boiling liquids
• Holding and cooling solutions
• Performing titrations, with the addition of a burette
• Culturing microbes when used with a stopper
• Storing samples

Sizes and Materials

Erlenmeyer flasks come in a variety of sizes, typically ranging from 50 mL to several liters. The choice of size depends on the volume of liquid that needs to be handled. While glass Erlenmeyer flasks are most common due to their resistance to heat and chemicals, plastic flasks are used for applications where breakage is a concern. Plastic flasks, however, are not suitable for applications involving high heat.

Safety Considerations

When heating an Erlenmeyer flask, it is important to ensure even heating and to avoid applying direct flame to one spot, which can cause the glass to break. It is also crucial to use appropriate personal protective equipment, such as safety goggles and lab coats, to prevent injury from spills or breakage.

In Popular Culture

The Erlenmeyer flask has become an iconic symbol of science and is frequently depicted in media and art as representative of chemical and biological research.

See Also

• Laboratory glassware
• Beaker (glassware)
• Volumetric flask
• Florence flask

Erlenmeyer Flask Resources
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