Question

Side A: 7% glucose 5% salt
Side B: 5% glucose 7% salt
Wha will the water concentration on each side be after the salt moves across the membrane?

Answer 1

Assuming equal volumes and that only the salt redistributes, the salt will equalize to (5% + 7%)/2 = 6% on each side. Total solute% then is:

- Side A: 7% glucose + 6% salt = 13% solute → water = 100 − 13 = 87%
- Side B: 5% glucose + 6% salt = 11% solute → water = 100 − 11 = 89%

So after the salt equilibrates, water concentration is 87% on A and 89% on B. (That means net water would tend to move from B → A until any remaining osmotic/hydrostatic balance is achieved.)