CHEMISTRY · Single correct · A Level · Chemistry · Chromatography · Chromatography
Problem
A laboratory mixture contains coarse sand, ethanol (boiling point 78 °C), and water (boiling point 100 °C). The goal is to collect pure liquid ethanol. Which sequence of separation steps is MOST effective?
(a) Simple distillation followed by gravity filtration
(b) Gravity filtration followed by simple distillation
(c) Vacuum filtration followed by fractional distillation
(d) Decantation followed by fractional distillation