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Question

Chemistry Question on Group 13 Elements

Solubility of iodine in water may be increased by adding:

A

chloroform

B

potassium iodide

C

carbon disulphide

D

sodium thiosulphate

Answer

potassium iodide

Explanation

Solution

The solubility of I2I _{2} in water increases by the addition of KI due to formation of polyhalide ion, i.e., I3−I _{3}^{-}. KI+I2⟶KI3KI + I _{2} \longrightarrow KI _{3}