Osmosis Lab · Water Potential & Cells

Solutions

⬅️ Left side

➡️ Right side

🔎 Look for

Small water molecules fit through the pores of the partially permeable membrane. Large sucrose molecules do not. Watch which side's level rises.

Cell

Solution outside the cell

🧂 Sucrose solution

Method

Cut 6 potato strips of the same size. Blot dry and weigh each one.
Place one strip in each sucrose solution. Press Start to soak for 30 minutes.
Remove each strip, blot dry and weigh again.
Plot % change in mass against concentration. Find where the curve crosses zero.

✏️ Your estimate

Which sucrose concentration has the same water potential as the potato cells?

mol/dm³

Created by Mr Lau Chin Hang

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