Five dialysis bags, constructed of a type of membrane that is permeable to water and 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

Question

Five dialysis bags, constructed of a type of membrane that is permeable to water and 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?

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

Quizplus · Accepted Answer

The line that represents the bag with the solution isotonic to the 0.6 M sucrose solution would show no net change in mass over time, indicating that there is no net movement of water across the membrane. This would occur when the concentration of the sucrose solution inside the bag is also 0.6 M. Looking at the graph, it can be seen that line C shows a plateau after an initial decrease in mass, indicating that the concentration inside the bag is stabilizing at the same concentration as the external solution, making C the correct answer.

Five Dialysis Bags, Constructed of a Type of Membrane That