Explain why: (b) Fused calcium chloride is used in the preparation of $F e C l_{3}$ .

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Solution

The anhydrous form of iron (Ⅲ) chloride is a highly deliquescent substance, which means it can absorb moisture from the atmosphere until it dissolves in the absorbed water and forms a solution. So it is kept dry with the help of fused calcium chloride which acts as a drying agent by absorbing moisture.

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