Question

If a 5% glucose solution (a) is separated from a 10% glucose solution (b) by a semipermeable membrane, glucose will diffuse from ____ to ____, and water will diffuse from ____ to ____.

Answer 1

Glucose will diffuse from Solution B to Solution A. (B has higher concentration of glucose)

Water will diffuse from Solution A to Solution B.
(A has lower concentration of glucose, thus higher water potential than B)

Answer 2

• Glucose will diffuse from solution B to solution A  and
• Water will diffuse from solution A(5% ) to solution B (10%)

The movement of water molecules between solutions of different  concentrations through a semi-permeable membrane is based on the phenomenon of osmosis, therefore water will move from a less concentration solution ( 5% glucose solution ) to a higher concentration solution ( 10% glucose solution ). while

The movement of glucose will be from a region of higher concentration ( solution B, 10% glucose solution ) to a low concentrated solution ( 5% glucose solution ).

Hence we can conclude that Glucose will diffuse from solution B to solution A  and Water will diffuse from solution A to solution B  .

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