A boiling flask with interchangeable joints, also known as a round-bottom flask, is a laboratory glassware commonly used for heating and boiling liquids. It is made of borosilicate glass, which is resistant to thermal shock and chemical corrosion.
The interchangeable joints on the boiling flask allow for easy attachment to other laboratory glassware, such as condensers, thermometers, or other adapters, which can be inserted into the joint for specific experimental purposes. The joint size may vary depending on the size of the boiling flask, and is typically standardized to allow for interchangeability between different laboratory apparatus.
The round-bottom shape of the boiling flask allows for uniform heating of the liquid inside, which is important for achieving a homogeneous reaction mixture. It also allows for easy swirling and mixing of the contents without spillage. The flat bottom of the flask enables it to stand upright on a laboratory bench or heating apparatus.
Boiling flasks with interchangeable joints are commonly used in organic chemistry for various types of reactions, such as distillations, refluxing, and solvent extractions. They are available in a range of sizes and shapes, with volumes ranging from a few milliliters to several liters.