CHEMISTRY · Single correct · A Level · Chemistry · Chromatography · Chromatography
Problem
A mixture contains ethanol (bp 78 °C), hexane (bp 69 °C), and solid NaCl. The goal is to obtain pure ethanol in maximum yield. Which of the following should be performed FIRST?
(a) Perform fractional distillation of the entire mixture
(b) Vacuum filtration to remove the solid NaCl
(c) Run the mixture through a separatory funnel and drain off the denser layer
(d) Cool the mixture in an ice bath to crystallize the ethanol