Osmosis Lab Report

According to the data from both the lab group and the class average, there is evidence that osmosis did occur in the bags. The largest change in mass was in the 1.0M sucrose bag the mass went from 12g initially to 14.2g, this gained 2.2g, an 18.3% change in mass for the group data over the duration of the experiment. The 0.2M bag went from 10.2g to 10.9g a 6.9% change in mass; the 0.4M bag went from 12.1g to 12.2g .83% change in mass; the 0.8M bag went from 10.9g to 12.2g and an 11.9% change in mass. During osmosis water diffuses, going from an area of low concentration of solute to an area of high concentration of solute. In the case of the lab, the area of low concentration of solute was in the beaker, and the are of high solute concentration
There is no definite support that diffusion occurred in the experiment because the water was never tested if sucrose was present in the beaker after the experiment. The class data also supports that osmosis occurred: 0.2M bag-8.46% increase in mass, 0.4M bag-17.606% increase, 0.8M bag-11.9% increase, and the 1.0M bag-43.828%
However, diffusion of the sucrose could have happened, because in the 0.6M bag of sucrose the mass went from 11.9g to 10.5g an 11.8% decrease in mass for the group data; and the 0.0M bag went from 8.5g to 7.9g a 7.1% decrease in mass. The sucrose, in the bag, was in a high concentration, and the water surrounding had a low concentration of sucrose. This made it possible for the sucrose to have diffused into the water. The class data for the 0.0M bag shows that it went through diffusion, the class percent change in mass was -9.002%. If the were soaked in a 0.6M sucrose solution instead of water, then the bags that held 0.0M sucrose, 0.2M sucrose, and 0.4M sucrose, would have the sucrose diffuse into the bag given that the bags are permeable to sucrose. Diffusion occurs when the solution goes from a high concentration to a low concentration. If the bags are below the 0.6M sucrose solution, then they will have a lower concentration of sucrose, thus the 0.6M solution would enter those bags. The 0.6M sucrose bag would have nothing occur because both the bag and the solution are both 0.6M, therefore, they are at equilibrium. The 0.8M bag and the 1.0M bag would diffuse into the 0.6M sucrose solution. They have higher concentrations of sucrose in them, so they will diffuse into a lower concentration, which happens to be the 0.6M sucrose