Question

Name:

The drying agent is used to dry hydrogen chloride.

Answer 1

Drying agents:

1. Desiccants are another name for drying agents.
2. They come in a variety of forms and can be found in foods, pharmaceuticals, packaging, manufacturing, and electronics.
3. A drying agent should have moisture properties that cause or maintain dryness in its immediate vicinity.
4. Examples of drying agents are Calcium chloride $\left({\mathrm{CaCL}}_2\right)$, Sulphuric acid$\left({\mathbf{H}}_{\mathbf{2}}{\mathbf{SO}}_{\mathbf{4}}\right)$, etc.

Sulphuric acid:

1. Sulphuric acid, also known as oil of vitriol in antiquity, is indeed a mineral acid with a molecular formula ${\mathrm{H}}_2{\mathrm{SO}}_4$ and is made up of the elements sulphur, oxygen, and hydrogen.
2. Sulphuric acid($\left({\mathbf{H}}_{\mathbf{2}}{\mathbf{SO}}_{\mathbf{4}}\right)$ is used in the purification of hydrogen chloride gas as a drying agent.

Reason:

1. Due to its hygroscopic nature, concentrated sulphuric acid absorbs moisture from the air, dilutes, and acts as a drying agent.
2. It has a high affinity for water, so it absorbs it quickly.

Sulphuric acid($\left({\mathbf{H}}_{\mathbf{2}}{\mathbf{SO}}_{\mathbf{4}}\right)$ is used to dry hydrogen chloride.