Differentiate between free diffusion and osmosis
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Both diffusion and osmosis are passive transport processes, which means they do not require any input of extra energy to occur. In both diffusion and osmosis, particles move from an area of higher concentration to one of lower concentration.
Diffusion can occur in any mixture, including one which includes a semipermeable membrane, while osmosis always occurs across a semipermeable membrane.
One big difference between osmosis and diffusion is that both solvent and solute particles are free to move in diffusion, but when we talk about osmosis, only the solvent molecules (water molecules) cross the membrane. This can be confusing to understand because while the solvent particles are moving from higher to lower solvent concentration across the membrane, they are moving from lower to higher solute concentration (from a more dilute solution to a region of more concentrated solution). This occurs naturally because the system seeks balance or equilibrium. If the solute particles can't cross a barrier, the only way to equalize concentration on both sides of the membrane is for the solvent particles to move in. You can consider osmosis to be a special case of diffusion in which diffusion occurs across a semipermeable membrane and only the water or other solvent moves.
Diffusion can occur in any mixture, including one which includes a semipermeable membrane, while osmosis always occurs across a semipermeable membrane.
One big difference between osmosis and diffusion is that both solvent and solute particles are free to move in diffusion, but when we talk about osmosis, only the solvent molecules (water molecules) cross the membrane. This can be confusing to understand because while the solvent particles are moving from higher to lower solvent concentration across the membrane, they are moving from lower to higher solute concentration (from a more dilute solution to a region of more concentrated solution). This occurs naturally because the system seeks balance or equilibrium. If the solute particles can't cross a barrier, the only way to equalize concentration on both sides of the membrane is for the solvent particles to move in. You can consider osmosis to be a special case of diffusion in which diffusion occurs across a semipermeable membrane and only the water or other solvent moves.
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DIFFUSION
1) Diffusion is the net downward movement of a given substance ( ions , atoms or molecules , etc .) along the free energy gradient from the place of its higher concentration to an area of its lesser concentration .
2) The Diffusion may occur in any medium and the diffusing particles may be solid , liquid or gas .
3) Presence of semipermeable membrane is not required .
OSMOSIS
1) Osmosis is a special type of diffusion of solvent molecules from low concentration of solution to higher concentration of solution , when the two are separated by a semipermeable membrane .
2) The Osmosis occurs in liquid medium and only the solvent molecules move from one place to another .
3) Presence of semipermeable membrane in between the two solutions is required .
1) Diffusion is the net downward movement of a given substance ( ions , atoms or molecules , etc .) along the free energy gradient from the place of its higher concentration to an area of its lesser concentration .
2) The Diffusion may occur in any medium and the diffusing particles may be solid , liquid or gas .
3) Presence of semipermeable membrane is not required .
OSMOSIS
1) Osmosis is a special type of diffusion of solvent molecules from low concentration of solution to higher concentration of solution , when the two are separated by a semipermeable membrane .
2) The Osmosis occurs in liquid medium and only the solvent molecules move from one place to another .
3) Presence of semipermeable membrane in between the two solutions is required .
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