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The Effect Of Concentrations Of Starch And Sugar Solutions On Synthetic Semi Permeable Membranes

608 words - 2 pages

Hope you injoy my science project very goodThe Effect of Concentrations of Starch and Sugar Solutions on Synthetic Semi-Permeable MembranesBy: Jamie HardyQuestion:Is dialysis tubing selectively permeable?Hypothesis:If one has dialysis tubing, which is dipped in water, filled with Gatorade and starch and is left for 15 minutes, the sugar in the Gatorade will exit the dialysis and into the water. So the dialysis is semi-permeable.Materials:16 cm dialysis tubingbeakercylindertest tubestransfer pipettesGatoradeStarch solution 10 g/1000 ml waterBenedict¹s SolutionIodine Solutionstringring standwater bathboiling chipsgogglesScientific Method:1. Each group will make up a Gatorade solution as follows:Group 1 1.0 M 3.4 g/10 mlGroup 2 0.5 M 1.7 g/10 mlGroup 3 0.5 M 1.7 g/10 mlGroup 4 0.2 M 0.7 g/10 mlGroup 5 0.2 M 0.7 g/10 mlNB: Tare the balance.Tare the balance with a test tube inside a beaker.Add the amount to the tube.Vortex, gradually turning the speed up.Heat in a water bath.Cool the tube.2. Wet the dialysis tubing with the beaker of distilled water.3. Twist one end of the tubing.4. Fold the twisted end over on itself.5. Tie a tight knot. Leave the extra string.6. Insert the transfer pipette (cut off top) about one third of the way into the tubing.7. Tie a knot securely around the transfer pipette. Leave the extra string.8. Add two transfer pipettes (two squirts) of the Gatorade solution to the tubing.9. Add two transfer pipettes (two squirts) of the starch solution to the tubing.10. If you spilled any solutions while transferring, carefully rinse the tubing.11. Fill the cylinder with distilled water to about 2.54 cm from the top.12. Place the tubing into the cylinder of water.13. Rest the apparatus against the ring stand.14. Note the height of the water in the tube.15. Record the time the tube was placed into the cylinder (it will stay for about 20 minutes)Time tubing was placed into cylinder: 1:15.00...

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