Passing through a drying agent (deliquescent or hygroscopic substances)
Explanation:
If solid/crystals, compound can be dried by applying heat to remove the water of crystallization.
Drying agents are also utile in removing moisture from compounds in a dessicator. Substances which absorb water from air can be used as drying agents for gases. For instance, , CaO or silica gel is suitable for drying gases, depending on reactivity of the substance.
When a mass of crystals containing Water of crystallization is heated sufiiciently to a high temperature, water vapor may be driven off the crystals by the action of heat alone.
