Determining Potato Tissue

778 Words Oct 6th, 2014 4 Pages
Determining the Molarity of Potato Tissue
Caleb Fox
Biology Lab 140

A) Abstract In order to determine the molarity of the potato tissue we placed the potato tissue into different concentrations of sucrose (0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6M), we measure the percent change in weight and we measured the different molarities of sucrose. We placed potato cores into different concentration of sucrose, and then we measured the weight of the potato cores before and after the experiment using a balance. Our hypothesis is supported by our data by the decreasing of our graph, in graph 1 and in table 1.
B) Introduction All cells have membranes that are selectively permeable. Selectively Permeable means that the membrane regulates what goes in and what goes out. For this experiment we learned about osmosis. Osmosis is the movement of water across the membrane, from high concentration to low concentration. We also learned from this experiment about, diffusion. Diffusion is when molecules, like water, move across the membrane from high concentration to low concentration. Our experimental groups were from 0 molarity---0.6 molarity of sucrose. We are using the terms isotonic, hypertonic, and hypotonic in this experiment. Isotonic meaning there is not weight change. Hypertonic meaning that there is weight loss. Hypotonic meaning that there is weight gain. The hypothesis we tested was: if put potato into a isotonic solution, then the mass…
Open Document