2.A semipermeable membrane is placed between the following solutions. Which solution will increase in volume? Solution C: 6.75% NaCl Solution D: 11.7% NaCl

## Answer

Solution A **1.31% (m/v) starch** will decrease in
volume.

Solution D **11.7% NaCl** will increase in volume.

1.

When two solutions are separated by a semi-permeable membrane, the solvent molecules (water molecules) move across the membrane from the solution having low concentration of solute to the solution having high concentration of solute.

Solution A has 1.31% starch and solution B has 7.48 % starch. So
solution B is the solution of higher concentration. As a result,
water molecules will move from solution A to solution B across the
membrane. Hence, the **volume of solution A will
decrease**.

2.

Solution C has 6.75 % NaCl and solution D has 11.7% NaCl. So,
solution D is having higher concentration and water molecules will
move from solution C to solution D. Hence **solution D will
increase in volume**.

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