Umama abid Lab Partners: Olivia, Emily Ms. Olenick SBI4U 9/23/2017
Analysis
The solution in the dialysis tube turned bluish black in color due to the transfer of iodine from the beaker to the bag which contains starch and glucose . The solution in the beaker turned brown after Benedict’s test ( table 1) . This indicates that the dialysis tubing was permeable to both glucose and iodine but not starch ( work helper, 2017) . Starch didn't pass because the solution in the beaker which contains iodine didn’t turn blue-black in color but remained yellow, this means that the initial weight increased due to the transfer of molecules ( work helper, 2017). The initial weight was 7.00g and the final weight was 7.44g.
Procedure
Goggles must be worn at all …show more content…
Two fifty milliliter of water was added to a beaker, with a size of two fifty milliliters with a sufficient amount of potassium iodide, making the water yellow in color. The dialysis tube was soaked in water for a few minutes until it opened up from both ends. One of the ends of the bags was folded and tied with a string, to close the end so that no solution is leaked through. The other end of the tube remained opened so that it forms a bag, and four milliliters of glucose and three milliliters of starch are added into the dialysis tube. The other end is, also closed and tied with string. Once the tube is fully closed it was weighed on a scale and rinsed under tap water and placed in the beaker made at the beginning of the lab. The dialysis tube is left in the beaker for about thirty minutes while being stirred. After thirty minutes the bag was carefully removed
Analysis
The solution in the dialysis tube turned bluish black in color due to the transfer of iodine from the beaker to the bag which contains starch and glucose . The solution in the beaker turned brown after Benedict’s test ( table 1) . This indicates that the dialysis tubing was permeable to both glucose and iodine but not starch ( work helper, 2017) . Starch didn't pass because the solution in the beaker which contains iodine didn’t turn blue-black in color but remained yellow, this means that the initial weight increased due to the transfer of molecules ( work helper, 2017). The initial weight was 7.00g and the final weight was 7.44g.
Procedure
Goggles must be worn at all …show more content…
Two fifty milliliter of water was added to a beaker, with a size of two fifty milliliters with a sufficient amount of potassium iodide, making the water yellow in color. The dialysis tube was soaked in water for a few minutes until it opened up from both ends. One of the ends of the bags was folded and tied with a string, to close the end so that no solution is leaked through. The other end of the tube remained opened so that it forms a bag, and four milliliters of glucose and three milliliters of starch are added into the dialysis tube. The other end is, also closed and tied with string. Once the tube is fully closed it was weighed on a scale and rinsed under tap water and placed in the beaker made at the beginning of the lab. The dialysis tube is left in the beaker for about thirty minutes while being stirred. After thirty minutes the bag was carefully removed