Question

a student wants to model the net movement of water out of a cell using a semi - permeable bag, water, a large beaker, and salt. which setup could be used to model the net movement of water out of a cell?
a. place a bag containing a 10% salt solution into a beaker containing a 10% salt solution
b. place a bag containing a 30% salt solution into a beaker containing a 20% salt solution
c. place a bag containing a 50% salt solution into a beaker containing a 10% salt solution
d. place a bag containing a 20% salt solution into a beaker containing a 40% salt solution

Explanation:

Water will move out of the cell (represented by the semi - permeable bag) through osmosis when the solute concentration outside is higher than inside. In option D, the bag has a 20% salt solution and the beaker has a 40% salt solution, creating a concentration gradient that will cause water to move out of the bag (modeling water movement out of a cell).

Answer:

D. Place a bag containing a 20% salt solution into a beaker containing a 40% salt solution