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why iodine is more soluble in KI solution than in water?

why iodine is more soluble in KI solution than in water?

Grade:11

2 Answers

Suraj Prasad IIT Patna
askIITians Faculty 286 Points
8 years ago
The I2 molecules in iodine are not very soluble in water because they are not alike. I2 is non-polar whereas H2O is polar. But KI solution contains I- ions which combine with the I2 molecules to form I3- ions because these are charged they dissolve in the water which is a polar solvent.
Yash Chourasiya
askIITians Faculty 256 Points
2 years ago
Dear Student

Iodine is covalent in nature and therefore, it does not dissolve in water which is polar.
In KI solution, iodine reacts to form KI3 which is ionic in nature.
Therefore, it becomes soluble in water.

I hope this answer will help you.
Thanks & Regards
Yash Chourasiya

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