Osmosis
...mount of water before and after the experiment. 4. Based on your observations, rank the following by relative size, beginning with the smallest: glucose molecules, water molecules, IKI molecules, membrane pores, and starch molecules. In order from smallest to largest it is water molecules, IKI molecules, glucose molecules, membrane pores, and starch molecules. 5. What results would you expect if the experiment started with a glucose and IKI solution inside the bag and only starch and water outside? I would expect nothing to occur. This is because molecules mover from high to low concentration. These molecules have already done that, and the others are not able to fit through the pores of the bag. Part 1B 6. Explain the relationship between the change in mass and the morality of sucrose within the dialysis bag. The more morality of the sucrose solution, the less the mass of the dialysis bag. This is because the sucrose solution will move out of the dialysis bag. 7. Predict what would happen to the mass of each bag in this experiment if all the bags were placed in 0.4 M sucrose solution instead of distilled water. Explain your response. The bags mass would stay the same. This is because when the bags are placed in the sucrose solution the molecules would move from high concentration to low concentration, but the concentration levels are already equal. Therefore the molecules will not move through the bag. This is because the water concentration is equal to the concentration of the sucrose. 8. Why did you calculate the percent change in mass rather than simply using the change in mass? Because if you used mass the graph wouldn’t show enough data to be used for anything, although if you use the percent change the graph would show much more useful data. Part 1C 9. Determine the molar concentration of the potato core. The concentration of the potato core, as you can see in the data and graph 1.4, is .3m. Part 1D 10. If a potato core were allowed to dehydrate by sitting in the open air, would the water potential of the potato cells increase or decrease? Why? The water potential of the potato cells would increase. This is because when the potato cells are dehydrated they shrivel, which leaves more room for water intake. It is also because when the potato cells lack water the sugar level is high, which would make it absorb more water. An example of this would be, would a wet sponge soak up more water than a dry sponge? No, this is because a wet sponge has already expanded to its maximum capacity, a dry sponge has room to expand. 11. If a plant cell has lower water potential than its surrounding environment and if pressure is ...