Tonicity describes one solution's solute concentration compared to that of another solution. The solution containing the lower concentration of solute molecules than another is hypotonic relative to the second solution. Solutions containing equal concentrations of solute are isotonic to each other, while one containing a greater concentration of solute relative to second one is hypertonic. 1. Were the contents of the vacuole in the Elodea leaf in distilled water hypotonic, isotonic or hypertonic compared to the dH 2 O ? 2. Was the 20% sucrose solution hypertonic, isotonic or relative to the cytoplasm?.