How do you handle hygroscopic solutes in the lab?

Hygroscopic solutes are handled in the lab by storing them in airtight containers and minimising their exposure to air.

Hygroscopic solutes are substances that readily absorb moisture from the atmosphere. This property can cause them to clump together, dissolve, or react with the water in the air, which can affect their chemical properties and make them difficult to work with. Therefore, it's crucial to handle these solutes with care in the lab.

The first step in handling hygroscopic solutes is to store them properly. They should be kept in airtight containers to prevent them from absorbing moisture from the air. These containers should be opened as little as possible, and quickly resealed after use. It's also a good idea to store these solutes in a dry, cool place to further minimise their exposure to moisture.

When working with hygroscopic solutes, it's important to measure them out quickly to limit their exposure to the air. If a hygroscopic solute does absorb moisture and clump together, you can break it up with a spatula before use, but be aware that this may not completely restore its original properties.

In some cases, you may need to dry a hygroscopic solute before use. This can be done by heating it gently in an oven or over a Bunsen burner, but be careful not to heat it too much, as this could cause it to decompose or react. Always follow your teacher's instructions or the instructions on the container when drying a hygroscopic solute.

Remember, safety is paramount when handling any chemical in the lab, including hygroscopic solutes. Always wear appropriate protective equipment, such as gloves and goggles, and follow all safety guidelines.