Question

the solution is: hypertonic / hypotonic / isotonic water will: not move / move into the cell / move out of the cell (repeated 6 times)

Explanation:

Step1: Recall definitions

Hypertonic - higher solute concentration outside cell. Hypotonic - lower solute concentration outside cell. Isotonic - equal solute concentration inside and outside cell. Water moves from low - solute to high - solute areas.

Step2: First case (75% H₂O in cell, 80% H₂O outside)

The cell has 25% solute and the solution has 20% solute. So the solution is hypotonic. Water will move into the cell.

Step3: Second case (57% H₂O in cell, 57% H₂O outside)

The solute and water concentrations are the same inside and outside. So the solution is isotonic. Water will not move.

Step4: Third case (60% H₂O in cell, 80% H₂O outside)

The cell has 40% solute and the solution has 20% solute. So the solution is hypotonic. Water will move into the cell.

Step5: Fourth case (85% H₂O in cell, 80% H₂O outside)

The cell has 15% solute and the solution has 20% solute. So the solution is hypertonic. Water will move out of the cell.

Step6: Fifth case (80% H₂O in cell, 80% H₂O outside)

The solute and water concentrations are equal. So the solution is isotonic. Water will not move.

Step7: Sixth case (90% H₂O in cell, 35% H₂O outside)

The cell has 10% solute and the solution has 65% solute. So the solution is hypertonic. Water will move out of the cell.

Answer:

1. The solution is: hypotonic. Water will: move into the cell.
2. The solution is: isotonic. Water will: not move.
3. The solution is: hypotonic. Water will: move into the cell.
4. The solution is: hypertonic. Water will: move out of the cell.
5. The solution is: isotonic. Water will: not move.
6. The solution is: hypertonic. Water will: move out of the cell.