When the isotonic saline solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. Based on this information, what can be said about these two solutions?The unknown solution had the higher concentration. The unknown solution had the lower concentration. The two solutions have the same concentration.

The unknown solution had the higher concentration.

Explanation:

Osmosis is the process where solvent molecules tend to move through a semipermeable membrane from a region of low concentration solution to a region of high concentration.

Also, low concentration of solute means high concentration of solvent, thus water is flowing from high concentration of solvent to low concentration of solvent.

Thus, as the unknown solution level drops, we can say that the concentration of unknown solution was higher as compared to the other solution.