ChemistryPhysical: Solutions

Based on the solute solvent interactions, arrange the following in th…

Based on the solute solvent interactions, arrange the following in the order of increasing solubility in n-octane.

A. Cyclohexane

B. KCl

C. CH₃OH

D. CH₃NH₂

E. CH₃CN

Choose the correct answer from the options given below:

Answer & explanation

Correct answer: option 2

n-Octane is nonpolar and can dissolve non-polar solutes. It cannot dissolve polar (and ionic) solutes.

Cyclohexane is non-polar. Hence, easily soluble in n-octane.

Methyl amine is less polar than acetonitrile (CH₃CN).

Methanol and acetonitrile are polar and have very low solubility in n-octane.

KCl is ionic compound and hence, insoluble in n-octane.

The increasing order for solubility in n-octane is as follows: KCl < CH₃OH < CH₃CN < CH₃NH₂ < Cyclohexane i.e., B < C < E < D < A.