Class 09/03

Today in class we did an experiment in which we tested to see the strength of the osmosis between six  different substances. We used six different unknown substances differentiated only by different colored food coloring. We put 7 ml of each substance into six different cells, massed them, and placed each cell in their own cup of water. We waited some time to allow the osmosis to take place, and after a while we took out the different cells and re-massed them. Each cell gained different amounts of mass and through this we could tell which substances contained more solute by the amount of osmosis that took place between the cells and the water. In ranking of most solute the solutions went: red, purple, yellow, green, clear, blue. We learned how in osmosis water is able to travel into and out of semipermeable cells.