burette

A burette is a piece of laboratory equipment used to dispense controlled amounts of a liquid, typically in the millilitre (mL) or microliter (μL) range. It is a long, graduated glass tube with a stopcock at the bottom. The stopcock is a valve that controls the flow of liquid from the burette. The graduations on the burette allow you to measure the volume of liquid that has been dispensed.

Burette is used in titrations, which are a type of chemical analysis. In a titration, a known volume of a solution of known concentration is added to a solution of unknown concentration until the reaction is complete. The volume of the known solution that is added is used to calculate the concentration of the unknown solution.

Burette is a versatile piece of equipment that is used in a variety of titrations. It is also used in other laboratory procedures, such as preparing standard solutions and performing volumetric analyses.

Here are some of the parts of a burette:

• Stem: The stem is the long, graduated tube of the burette. It is made of glass and it is marked with graduations that indicate the volume of liquid that has been dispensed.
• Stopcock: The stopcock is the valve at the bottom of the burette. It is used to control the flow of liquid from the burette.
• Buret clamp: The buret clamp is a device that holds the burette in place. It is usually made of metal and it has a screw that can be tightened to secure the burette.

Here are some of the safety precautions that should be taken when using a burette:

• Always wear safety goggles when using a burette.
• Never leave a burette unattended.
• Turn off the stopcock when you are finished using the burette.
• Do not point the burette at yourself or other people.
• Be careful not to drop the burette, as it could break and the glass shards could be dangerous.

The chemist used a burette to deliver the acid into the solution.