A BIO 205 groups tests the rate of osmosis through dialysis sacs. They prepare 5

Question

A BIO 205 groups tests the rate of osmosis through dialysis sacs. They prepare 5 beakers, with 200 ml of solution each, and 5 sacs, with 10 ml of solution each, according to the table. Which of the following scenarios will allow them to prepare enough 10% sucrose with no more than 10 ml leftover?

A. 100 ml of 60% sucrose diluted to 10% with RO water

B. 110 ml of 40% sucrose diluted to 10% with RO water

C. 70 ml of 30% sucrose diluted to 10% with RO water D. 55 ml of 40% sucrose diluted to 10% with RO water

E. 70 ml of 60% sucrose diluted to 10% with RO water

Explanation / Answer

Solution:

According to the question we require at least;

5 beakers X 200 mL = 1000 mL &

5 sacs X 10 mL = 50 mL

so the total requiremnt = 1050 mL.

However using C1*V1=C2*V2, we find that A, B, C, D & E can give 600 mL, 440 mL, 210 mL, 220 mL & 420 mL. So none of the option fits the bill. Probably one of the figure is incorrect (may be the volume in beakers).

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