Permeable membranes lab /iodine and vegetable oil

Introduction This experiment is based on the problem of whether the Ziploc posterior give allow the tincture of atomic number 53 or stiffen to diffuse crosswise the ductile membrane. The hypothesis creation sampleed is if the bag will allow the iodine to travel crossways the membrane and if it will react with the stiffen in the Ziploc bag. cognitive process 1.          spill over 25 mL of iodine into beaker 2.          live up to about 1/3 of the running play tube with starch solution and place in beaker (DONT POUR OUT!!!!) 3.         Pour 25 mL of starch solution into snack sizing Ziploc bag 4.         Seal Ziploc bag, and place in beaker 5.         Wait 24 hours and then record results Results The results of this experiment atomic number 18 that the starch in the bag turned a compound purple in color and there is less iodine in the beaker than previously noted. The control starch in the test tube did not change at all.

Conclusion The starch molecules in the bag were too large to diffuse with the plastic and therefore the iodine diffused into the bag and reacted with the starch ever-changing it to the color purple. The control stayed unaltered because iodine and starch do not diffuse through glass. Very keen introduction and conclusion. Procedure and Results, neatly and thoroughly explained. Nicely through biology lab. If you essential to get a full essay, tell it on our website: BestEssayCheap.com
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