Which of the following statements regarding the rule "like dissolves like" is incorrect? A)Since cooking oil is composed primarily of hydrocarbons, it is insoluble in water. B)Iodine, I₂, is very soluble in water. C)Ethanol, CH₃CH₂OH, is water-soluble. D)Cooking oil, a nonpolar substance, is soluble in hexane, C₆H₁₄. E)Potassium nitrate, KNO₃, is soluble in water.

Question

Quizplus · Accepted Answer

Iodine, I₂, is actually insoluble in water. This is because iodine is a nonpolar molecule and water is polar, so they do not have compatible intermolecular forces for mixing. The correct statement would be that iodine is very soluble in nonpolar solvents like hexane or carbon tetrachloride.

Which of the Following Statements Regarding the Rule "Like Dissolves