Question

which of the following is an example of osmosis? ice melts and puddles on the floor. sugar diffuses in a glass of water. all of these are correct. a potato gains mass when placed in purified water.

Explanation:

Osmosis is the movement of water molecules across a semi - permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

• Ice melting is a physical change (phase change) and not osmosis.
• Sugar diffusing in water is simple diffusion (movement of solute particles), not osmosis (which is about water movement across a semi - permeable membrane).
• When a potato is placed in purified water, water moves into the potato cells (which have a higher solute concentration inside compared to the pure water outside) across the semi - permeable cell membranes. This is an example of osmosis.

Answer:

A potato gains mass when placed in purified water.