Biology Post Lab on Osmosis and Diffusion

Brian Toohey Biology Mrs. Heimforth 12/06/10 Diffuse the Osmosis portion 2 Introduction Step 1 The scientific concept of this testing ground was to see how osmosis transferred the substance through the cells to r distributively equilibrium. Step 2 My hypothesis was that the grasp with 60% saccharose then it would be heavier than the bag with tap body of piss or 30% sucrose. I thought this because I thought that there would be more of a substance change in 60% sucrose. constituent 3 Methods First get 3 pieces of the same length of tubing then get 6 pieces of string. Fold one half of the tube over and tie the end with string.Then add 5 ml of 30% sucrose solution in the tubes. Squeeze the bag gently to release air come out it over and tie it with another piece of string. Rinse bags under water then dry. Then moot bags to nearest tenth of a gram and record. Then place one bag in each of the beakers. Then let them sit for 30 minutes do not touch. Remove bags quickly sweep and dry and reweigh. Then record results. Section 4 Results Step 1 60% sucrose 30% sucrose Tap Water before 6. 2 4. 6 5. 4 after 4. 3 4. 5 4. 8 Step 2 As the sucrose decreases so does the weight.I have found that when you decrease the arrive of sucrose it will cause the water to go outward making the bag weigh less(prenominal). Section 5 Step 1 The lab experimentation did not hold back my hypothesis because the weight diminish more with the sucrose. Step 2 The specific data that made my hypothesis wrong is the fact that when we added less sucrose the after weight decreased as shown in my graph. Step 3 The results did not support my hypothesis because when the water was greater on the inside it went outside by using osmosis but when the water was greater on the outside it went inside making the bag heavier.Step 4 When we were conducting the experiment one bag might have sat in the cups to long. Step 5 I have learned that water is the only thing that can be sent through the ce ll without using energy. I in like manner learned that through diffusion smell spreads. Step 6 I learned that it is very badly to keep track of things you dont label it takes a lot of memory. )Section 6 References Postlehwait, John H. , and Janet L. Hopson. Modern Biology. Austin Holt, Rinehard, and Winston, 2006. 65-73. yarn-dye