LAB 1 - LAB 1 NOTE: These labs are known for high failure...

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LAB 1 NOTE: These labs are known for high failure rates. Therefore, if I show an example using data, a graph, etc… yours may be totally different depending upon mine and yours success with the lab. So don’t freak if your data is completely different from mine. And therefore the analysis of results sometimes may need to be answered differently since you base your analysis off your data and not mine. DISCLAMIER: DO NOT CHEAT! Table 1.1 initial contents initial final initial final bag 15% glucose clear blue + + 1% starch murky beaker H2O plus IKI brown light brown - - Analysis of results: 1. Which substance(s) are entering the bag and which are leaving the bag? What experimental evidence supports your answer? The iodine is entering the bag (hence the color change from murky clear to blue). The starch and glucose are not able to pass through the dialysis tubing into the beaker because the dialysis tubing is semi-permeable, and the starch and glucose are too big to fit through. It can be concluded that the starch and glucose could not pass through because the brown solution never turned blue like in the dialysis tubing. There was a negative result for glucose in the beaker after 30 minutes. 2. Explain the results you obtained. Include the concentration differences and membrane pore size in your discussion. Diffusion is the random movement of molecules from an area of higher concentration to an area of lower concentration. The beaker was highly concentrated with IKI and the dialysis tubing with a solution of glucose and starch. According to the definition of diffusion, the molecules would move into an area of lower concentration until equilibrium. The dialysis tubing acts as a membrane and the pores are semi-permeable. The IKI molecules were able to diffuse into the glucose and starch solution, but the solution could not diffuse into the IKI because the glucose and starch molecules were too big. 3.
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LAB 1 - LAB 1 NOTE: These labs are known for high failure...

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