predict what happens when a cell is placed in a solution with an equal concentration of water outside the cell and inside the cell.

Nothing will happen. This is know as an isotonic solution. Meaning the osmotic pressure inside the cell equals the osmotic pressure outside of the cell. Aka. theres the same amount of water inside and outside the cell, so no osmosis will happen because a difference in concentrations is required.

Answer: Nothing will happen.

Explanation: When a cell is placed in a solution with an equal concentration of water outside the cell and inside the cell, there will be no movement of water molecules across the cell membrane. There will be no osmosis because the solution inside the cell and the solution outside the cell are isotonic, this means that they have equal concentration. The two solutions are in equilibrium, therefore there will be no movement of water molecules across the cell membrane. For osmosis to occur there must be different between the water concentration in the two environments.