( ( Impurities ( which ( are ( soluble ( in ( the solvent ) ) ) ) ) ) ( ( ( remain ( in solution ) ) ( as ( ( the solution ) ( ( is not ) ( ( saturated ( with respect ) ) ( to them ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Impurities)) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADJP (JJ soluble) (PP (IN in) (NP (DT the) (JJ solvent)))))))) (VP (VBP remain) (PP (IN in) (NP (NN solution))) (SBAR (IN as) (S (NP (DT the) (NN solution)) (VP (VBZ is) (RB not) (VP (VBN saturated) (PP (IN with) (NP (NN respect))) (PP (TO to) (NP (PRP them)))))))) (. .)))
Impurities which are soluble in the solvent remain in solution as the solution is not saturated with respect to them.
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN solution)) (VP (VBZ contains) (ADJP (ADJP (RB so) (RB much) (JJ solute)) (SBAR (IN that) (S (NP (PRP$ its) (JJ solubility) (NN limit)) (VP (VBZ is) (VP (VBN reached))))))))) (, ,) (NP (DT the) (NN solution)) (VP (VBZ is) (VP (VBN said) (S (VP (TO to) (VP (VB be) (VP (VBN saturated))))))) (. .)))