In principle, just about all substances diffuse, with a variation of rates. Diffusion is the process in which the particles are uniformly distributed or at equilibrium, and the process of random movement toward a state of equilibrium. In diffusion, motions are uniquely at random can produce a net mevement-always a direction from a diffusion of water from high concentration to low concentration through a selectively permeable membrane. This process of diffusion of water is a passive process, meaning without any use of energy.
Diffusion is imperative for the distribution of ion and other solutes within a cell.
Small molecules and ions may move from one end of an organelle to another in a fraction of a millisecond, or from the center of a cell to its surface almost as fast. Solute concentration is related to osmotic pressure. Greater the solute concentration, greater the osmotic pressure, and greater the tendency to absorb water. A solution with a higher concentration of solutes. The solution with lower solute concentration.