Separations of Solutions and Mixtures Practice Test

A liquid mixture contains hexane (nonpolar, $b.p.\approx 69,^{\circ}\mathrm{C}$) and octane (nonpolar, $b.p.\approx 126,^{\circ}\mathrm{C}$). The goal is to separate and collect both liquids with good purity. Which method is most appropriate?

A student has a mixture of sand and a sodium chloride solution (saltwater). The goal is to obtain dry sand and also recover solid sodium chloride. Which sequence of techniques best accomplishes both separations?