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HI MRQUICK TODAY WAS A LAB DAY.

Today we did half of a large lab that worked around the properties of osmosis and diffusion. The first half of the class involved us working in groups of two and attempting to teach another group of two how diffusion and osmosis worked. So Raymond “Rattyray” Tang and I proceeded to teach Anita and Sean how diffusion and osmosis worked.

The second half of the class consisted of a very large lab. We did three parts to the lab. The first part was us putting five different solutions of different molarity into dialysis bags, measuring them, and setting them in distilled water for exactly twenty minutes. After the twenty-minute mark, we took the bags out and measured the weight of each bag and figured out the percent of mass change. We figured that the higher the molarity of the dialysis bag, the more mass change because there was more water that was needed to go into the bag in order to lower the molarity.

The second part we did was using Gatorade and different colored solutions. We placed 5 mL of Gatorade into cups of different colored solutions to find the molarity of the Gatorade. Because we knew the molarity of the different solutions, after we measured the percent mass change of each test, we were able to find the molarity of the Gatorade based on the molarity of the different solutions 

The third part involved the molarity of different potatoes as we put them in different solutions. We were able to do the same and figure out the molarity of the potato by graphing the results and figuring out when the 0 percent mass change happened at what general molarity. 

Board of teaching

                                                                               Mr. Quick Lecturing