Chemistry — Choosing a Separation Technique

digraph Separation {
  rankdir=TB;
  node [shape=box, style=rounded];
  Q1 [label="Insoluble solid in liquid?"];
  Q2 [label="Want the dissolved solid?"];
  Q3 [label="Two liquids, miscible?"];
  Filtration; Evaporation; Crystallisation; Distillation;
  SepFunnel [label="Separating funnel"];
  Q1 -> Filtration [label="yes"];
  Q1 -> Q2 [label="no (in solution)"];
  Q2 -> Evaporation [label="yes (stable)"];
  Q2 -> Distillation [label="want the liquid"];
  Q3 -> Distillation [label="yes (fractional)"];
  Q3 -> SepFunnel [label="no (immiscible)"];
}