"Weighting bottle" is a laboratory apparatus used for precise weighing and storage of substances in a controlled environment. It typically consists of a small, narrow-necked glass bottle with a stopper or lid.

 

The design of the weighting bottle is intended to ensure accurate measurements of substances. The narrow neck helps prevent spillage or loss of the material being weighed, while the stopper or lid provides a tight seal to protect the contents from external influences such as moisture or air.

 

Weighting bottles are commonly used in analytical chemistry, pharmaceutical research, and other scientific disciplines where precise weighing is required. They are especially useful when dealing with hygroscopic substances, volatile materials, or samples that need to be protected from contamination.

 

To use a weighting bottle, the substance is carefully placed inside, and the stopper or lid is securely closed to create a sealed environment. This prevents any changes in the substance's weight due to moisture absorption or evaporation.

 

Weighting bottles come in various sizes and materials, with glass being a common choice due to its chemical resistance and transparency. Some weighting bottles may also have a ground glass joint or a flat base to ensure stability when placed on a balance.

 

In summary, a weighting bottle is a laboratory container designed for precise weighing and storage of substances. It provides a controlled environment to protect the contents and ensures accurate measurements, making it an essential tool in many scientific experiments and analyses.