Question

Predict which solvent will dissolve more of the given solute: input just the number of the solvent, so either 1 or 2

A. potassium chloride in ethanol (CH3CH2OH) (1) or 1-heptanol (C7H15OH) (2)

B. ethanol (CH3CH2OH) in water (1) or hexane (CH3(CH2)4CH3) (2)

C. chloromethane (CH3Cl) in chloroform (CHCl3) (1) or in methanol (CH3OH) (2)

Answer 1

ANSWER:

A. Potassium chloride is an ionic compound. Hence it will dissolve in polar solvent. Heptanol has more number of carbon than ethanol which makes it less polar than ethanol. So, KCl will be more soluble in ethanol (1).

B. Ethanol has oxygen atom which makes it polar compound. Since, like dissolves like, polar will be soluble in polar. Hence, ethanol will be more soluble in water.

C. Chloromethane is a polar compound. Among chloroform and methanol, chloroform is more polar. Hence chloromethane will be more soluble in chloroform.