超容易題目(f.3)

The above answer is wrong.

The membrane of a dialysis tubing is differentially permeable. As the concentration of glucose in the tubing is higher than the distilled water, glucose molecules diffuse through the membrane and thus, water potential in the beaker decreases.

After a while, the water potential in the tubing and the beaker reach the same level, there is no NET movement of water molecules. Therefore, the water level inside the tubing stops rising.

順帶一提, 原本你一開始講係glucose, 中文應該係葡萄糖而非蔗糖, 蔗糖即係sucrose

假若係sucrose solutoin的話, sucrose molecules are too big to pass through the membrane spaces, diffusion will not occur. water level keeps rising.

這問題 9 唔搭 8。又透析管但之後又 cell, 又 glucose solution 但之後又蔗糖溶液，係什麼上升又沒講清楚...

Because there is a potential difference so there is a net movement of water molecules move from high water potential to low water potential through differentially permeable membrane(透析管).So water level inside 透析管 rises.