A round bottom flask is a type of laboratory glassware with a spherical bottom and one or more narrow necks, typically made of heat-resistant borosilicate glass. Its round shape allows for uniform heating and is used for boiling liquids, conducting chemical reactions, and in distillation setups. It requires external support like a clamp or cork ring to remain upright.
Description
Shape: Spherical bottom with an elongated neck or multiple necks.
Material: Usually made of heat-resistant borosilicate glass.
Features: Some models have ground glass joints for a hermetic seal, and multi-neck flasks allow for additional equipment like thermometers or stirrers.
Support: Because of the round bottom, it must be held in place by a stand, clamp, or cork ring to prevent it from rolling over.
Uses
Heating and boiling: The uniform shape allows for even heating and boiling of liquids.
Chemical reactions: Used to contain chemical reactions, especially for reflux setups and organic synthesis.
Distillation: Serves as both the distilling flask and the receiving flask for the distillate.
Rotary evaporators: Often used as the distilling flask in a rotary evaporator.
Storage and containment: Can be used to store chemicals, but are more specialized for processes that require heating or vacuum.