Five dialysis bags, constructed from a semipermeable membrane that is impermeable to sucrose, were filled with various concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 M sucrose solution. At 10-minute intervals, the bags were massed (weighed) and the percent change in mass of each bag was graphed.

-Which line in the graph represents the bag that contained a solution isotonic to the 0.6 M solution at the beginning of the experiment?
A) A
B) B
C) C
D) D
E) E

Question

Five dialysis bags, constructed from a semipermeable membrane that is impermeable to sucrose, were filled with various concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 M sucrose solution. At 10-minute intervals, the bags were massed (weighed) and the percent change in mass of each bag was graphed.
 
-Which line in the graph represents the bag that contained a solution isotonic to the 0.6 M solution at the beginning of the experiment?
A) A 
B) B 
C) C 
D) D 
E) E

Quizplus · Accepted Answer

The line that represents the bag with a solution that is isotonic to the 0.6 M sucrose solution will show no net change in mass over time, indicating that the concentration inside the bag is equal to the concentration outside the bag. Looking at the graph, we see that only line C shows this characteristic, as it remains relatively flat over time. Therefore, the answer is C.

Five Dialysis Bags, Constructed from a Semipermeable Membrane That Is