1. You fill each of three (10 ml) dialysis tubes with one of the following subst
ID: 166404 • Letter: 1
Question
1. You fill each of three (10 ml) dialysis tubes with one of the following substances A. 2% by weight of glucose(MW 180) in RO water B. 2% by weight bovine serum albumin (MW 66000) in RO water C. 2% by weight CaCL2 (MW 110.99) in RO water The dialysis tubing is impermeable to the solutes each bag initially weighs 10.0 g. Bags are placed in two separate beakers of RO water. After two hours the bags are removed and the weight record it. How do you explain the difference in final weeks of that dialysis tube's in the table below.2. How much 0.20M sucrose can be made from 250 ml of 0.5M sucrose
3. A patient may be diagnosed with diabetes if he/she has a blood glucose level greater than 200 mg/dl. What is the molarity (in mM) of this glucose level? ( MW= 180.156) (dl= deciliter= 1/10 of a liter) Weekly Solution Calculations 1. You fill each of three (10 ml dialysis tubes with one of the following substances: a. 2% by weight of glucose (MW 180) in RO water. b. 2% by weight bovine serum albumin (MW 66.000 in RO water. c. 2% by weight CaCI MW 110.99) in RO water The dialysis tubing is impermeable to the solutes. Each bag initially weighs 10.0 g. Bags are placed into separate beakers of RO water. After two hours the bags are removed and the weight recorded. How do you explain the difference in final weights of the dialysis tubes in the table below? Dial Tube Weight Glucose 13.2 g Bovine Serum Albumin 10.9 g CaCl 151 2. How much 0.20 M sucrose can be made from 250 ml of 0.5 M sucrose?
Explanation / Answer
1. The amount of water entering inside the dialysis bag will be directly proportional to the molarity of solution inside it. Hence the solution with maximum molarity atrracts more water and will become heaviest.
In all 3 solutes, CaCl2 has least molar mass and albumin has the maximum. So molarity of 2% by weight CaCl2 will be maximum and that of albumin will be minimum. That explains the maximum weight of CaCl2 bag and minimum that of albumin.
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