Dialysis Lab Report
Analysis During the experiment, a dialysis bag was used to mimic a cell membrane. Two ways why this model realistically represents a cell is because the dialysis bag is semi-permeable, like a cell. The bag was able to allow water in, as the size of the water molecule was small enough to be able to fit through the pores of the bag. Sucrose was not able to pass through as the molecules were too big to enter. This is similar to a cell because the size of a molecule can determine whether or not the substance can enter the cell through diffusion. Larger molecules will require facilitated diffusion, using a transport protein, or active transport, using a transport protein and also ATP (HyperPhysics.edu). Since water can pass through the dialysis
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The outside of the bag has 10.57% sucrose, so it has 89.43% water. Since the outside of the bag is hypotonic to the inside of the bag, which is hypertonic, the water’s net movement will flow into the bag. Also since the dialysis bag’s weight heavily depends on the amount of water, the mass will go up when water is gained. The class average for amount of mass gained was 22.55%. A bag that lost mass was the bag with 0% concentration, which means it has 100% water. The outside of the bag has 10.57% sucrose and 89.43% water. This makes the outside of the bag hypertonic to the inside, resulting in a net flow of water the outside in order to reach equilibrium. By losing water, the inside of the bag will have a lower mass and is shown in the class average of -20.61% decrease in mass. A source of procedural error was that the bags could have possibly leaked the solution because the only way the bags were sealed was with a knot. The solution could have leaked and affected the data by decreasing the mass of the bag. This could be indicated by how mixed the results are. The percentage change in mass in table 1.2 are way off compared to the percentage change in mass, corrected. Another source of procedural error was the location
The outside of the bag has 10.57% sucrose, so it has 89.43% water. Since the outside of the bag is hypotonic to the inside of the bag, which is hypertonic, the water’s net movement will flow into the bag. Also since the dialysis bag’s weight heavily depends on the amount of water, the mass will go up when water is gained. The class average for amount of mass gained was 22.55%. A bag that lost mass was the bag with 0% concentration, which means it has 100% water. The outside of the bag has 10.57% sucrose and 89.43% water. This makes the outside of the bag hypertonic to the inside, resulting in a net flow of water the outside in order to reach equilibrium. By losing water, the inside of the bag will have a lower mass and is shown in the class average of -20.61% decrease in mass. A source of procedural error was that the bags could have possibly leaked the solution because the only way the bags were sealed was with a knot. The solution could have leaked and affected the data by decreasing the mass of the bag. This could be indicated by how mixed the results are. The percentage change in mass in table 1.2 are way off compared to the percentage change in mass, corrected. Another source of procedural error was the location