Answer Happy

Two equal volumes of liquid are added to a chamber, separated by a semipermeable membrane. Water molecules (and only water molecules) can pass easily through the membrane. On one side (Side A) the liquid is pure water. On the other (Side B) the solution contains a high concentration of salt (NaCl) in water. After two hours, you observe that the water level on Side B is higher than on Side A. Which of the following best explains this result? Water molecules repel each other, and diffuse away from areas of high concentration of water Solute particles bound to water molecules, move away from a membrane impermeable to the solute, pulling water molecules across the membrane permeable to water. Water molecules attract each other, and form bonds between water molecules that are stronger than those between water and the solute particles, drawing water toward areas of high solute concentration where water-solute bonds break and water-water bonds form. Water molecules form stronger bonds with solute particles, than with neighboring water molecules, pulling water molecules across the membrane toward high concentrations of solute particles.