Lab Analysis Of Osmosis In Potato Tissue

Osmosis in Potato Tissue This was the first lab that we attempted. The first thing we did was slice a potato into approximately 40 slices with a potato slicer supplied for us in the room. We carried the potato slices to our table on a wet paper towel to decrease the amount of moisture lost in this time. We then chose the pieces that were most complete, and we placed 8 of those slices into 5 different Styrofoam bowls. Using the supplied scale, we measured the weight of the 5 bowls with the potato slices in them (the scales were zeroed at the weight of one Styrofoam bowl). We recorded this data in our tables provided on the lab write up. After we weighed the bowls and recorded the data, we filled each bowl with the solution of NaCl that corresponded to what was written on the bowl. We filled the bowls to where the level of liquid was 1 cm over the height of the potato slices so they were completely emerged in the solution. After we had filled the bowls with the solutions of 0.0%, 0.5%, 1.0%, 2.0%, and 3.0% NaCl, we let the potato slices sit in the solutions for 90 min. …show more content…
We had a premade solution of 5% NaCl supplied for us at our table, so we used that for this part of the experiment. Using the same slide as before, we added a drop of the solution to one side of the cover slip, and put a Kimwipe tissue on the other side to draw the water out from underneath the cover slip. By doing this we also pulled the solution of NaCl under the cover slip. We watched this process in the microscope, and drew the outcome on the same data sheet as before. Once again we labeled the cell wall, chloroplasts, and the cytoplasm, along with the location of the cell membrane. After we were done taking notes over the plasmolyzed cells, we used the same process of getting the NaCl under the coverslip to get distilled water underneath the coverslip and observed what happened. We then took notes over this