Why iodine more soluble in potassium iodide than in water?

Answer 1

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.

Answer 2

No. Iodine exist as I2, which is formed by the induced dipole-induced dipole interaction. Thus, it is a non-polar compound.

Water, which is a polar solvent, prefers to stay hydrogen bonded then break up iodine. Remember: like dissolves like. This means that non-polar compounds like iodine will dissolve in non-polar solvent such as hexane, which polar compounds such as hydrochlorine gas will dissolve in polar solvents like water.

Answer 3

Iodine is more soluble in potassium iodide than in water because potassium iodide forms complex ions with iodine, increasing its solubility through ion-dipole interactions. In contrast, water lacks the appropriate interactions to solvate iodine effectively, resulting in lower solubility.

Answer 4

Like dissolves like. Iodine can't dissolve in water because water is polar and iodine in non polar. It's the same reason oil and water don't mix.

Answer 5

Elemental iodine is slightly soluble in water and the amount is determined by temperature. At 20 degrees centigrade it is low

Answer 6

It is approximately 0.029 g of iodine per 100 g of water at 20 oC.