Answer:
Step-by-step explanation:
After 20 minutes, in Beaker 1, the distilled water bag will gain weight due to the water from the beaker diffusing into the bag through the permeable membrane. This is because the concentration of water molecules is higher on the outside of the bag and the water will move from an area of high concentration to an area of low concentration. The sugar water bag will not change in weight because the membrane is not permeable to the sugar molecules and so they will not diffuse through the membrane.
In Beaker 2, the distilled water bag will lose weight as the water inside the bag will diffuse out of the bag and into the beaker because the concentration of water inside the bag is higher than the concentration of water outside the bag. The sugar water bag will not change in weight because the membrane is not permeable to the sugar molecules, and so they will not diffuse through the membrane.
In Beaker 3, both the distilled water and the sugar water bags will not change in weight because the concentration of water and sugar inside the bags are the same as the concentration of water and sugar outside the bags, so there will be no net movement of water or sugar through the membrane.