this is an extra credit question, I searched the net and this forum and could not find an answer that was really related:
solubility g/100g water
MgCl2 (s) magnesium chloride = 54.6
NH3 (g) ammonia = 34.0
CH3CH2OH (l) ethanol = infinite
C6H5COOH (s) benzoic acid = 0.29
Which of the substances can act as either the solute or the solvent when mixed with 100g water at 20 degrees c?
as a wild guess, I would say ethanol.