Lab 4 Diffusion and Osmosis Essay

1. Diffusion and Osmosis, June 4, 20132. Purpose The purpose of this lab is to help cash in ones chips visual belowstanding of diffusion which is a declaration of uplifted submergence spontaneously (no energy required) moving to an area of low concentration. Also pickings a look at osmosis, which is the front man of chemicals across the jail cell membrane. Osmosis requires rough type of energy to be put in for this to happen. After these experiments we should generate a better idea and visualization of how chemicals transfer across the cell membrane.3. MaterialsDropper bottle of waterCompound microscopeDissecting needleCarmine pulverisationSlide and crownslip3 test tubesTransfer pipets2 400 ml beaker30 cm moist dialysis tubing500ml beakerHot plateBenedicts reagentI2KI etymon starch solutionWax pencil30% glucose solution wagon train or rubber band turn out tube rackSlides and cover plates4. Methods and ProceduresExperiment 1Prepare a slide of dry cherry and water and cover slip Put under the microscope, examine under the assorted magnifications, temperament you findings to later set up your conclusion. Experiment 2 Use dialysis tubing that has been soaking in water, fold it accordion entitle and use string to close the ends wish a dish antenna. Roll turnaround end of bag till it opens and add 4 pipettes of 30% glucose into it. play 4 pipettes of starch solution into it.Mix heart and souls with bag closed. therefore rinse with tap water. Add 300 mL of water to a 400- to 500- ml. add a few drops of solution till it turns an amber-yellow color. Leave bag in beaker for 30 minutes.Remove bag then let it dry. evidence observations.Experiment 3Obtain 7 equal size quality hole piston chamber from the potato, cut roughly to the same size record the length and weight of each making sure they remain order. adjoining is to collect 7 cups filled with 100 ml of the 6 different concentrations of glucose (, 0.1 0.2, 0.3, 0.4, 0.5, 0.6, and water). Record the time and submerge the potato cylinders in the solutions. Let them drive for an hour and half before removing, weighting and recording the final weight.5. Observations and selective informationExperiment 1Carmine powder observation movement is random, looks like continuous vibrations Experiment 2Table 1Benedicts TestTest final colorBefore light up of Benedicts testAfter heat Final ColorWater (control)ClearBaby blue spunkyBagSlight yellowBaby blueYellowish parking lotBeakerGoldBaby blueOrange/pinkAfter let the bag sit inner(a) the bath for 30 minutes the solution inside the bag went from a clear color to a push aside yellow color. And after the final results of benedicts test I can close up the carbohydrates did move from inside the bag out.My observation concerning the size of the potato cylinder in the glucose decreased as the concentration of glucose increased and the potato in water remained the same size. 6. ConclusionThe carmine powder experiment turn out the theory of diffusion because with no energy required you can envision the movement of particles under a microscope. Again diffusion is the movement of molecules from high concentration to low concentration with no energy required. On the some other hand the experiment concerning osmosis were the dialysis bag and the saturation of the potato. Both experiments demonstrated the movement of sugar or water across a cell membrane. On the dialysis bag experiment we could see the slight color multifariousness as the IKI did move across the membrane in to the bag but the well-favored surprise was see that after the benedicts test how strong the sugar content was in the beaker solution.Lastly the potato experiment demonstrated through the change in weight how water could pass through the membrane. As we see the greater concentration of glucose the more shriveled the potato got, indicating the water inside the potato exited out trying to make the concentration equal. The solution containing stri ngently water made the potato swell as if the concentration inside was lower than the concentration outside.