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Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration through a partially/selectively permeable membrane (PPM). It occurs because of concentration gradients; the water moves from the high water concentration area through the PPM to 'balance out' the amount of water on either ...
Osmosis is the movement of water through a semipermeable membrane from areas of higher water concentration to areas of lower water concentration. This video discusses the changes which occur in plant cells when they are placed into hypertonic and hypotonic solutions. Osmosis in Red Onion Cells - Mr Pauller. Video from: Noel Pauller.
As osmosis obeys the 2nd law then it is energetically favourable that it should occur. Because water can dissolve into and pass through semipermeable membranes by diffusion and nothing else can.
They mainly occur due to the concentration changes at two points Diffusion This is the net movement of ions or molecules that move to lower concentration for a higher concentration. molecules move to the place where there is lower concentration of the same molecule., they do not require any kind of membrane Osmosis This is the net movement of water molecules from a higher to lower ...
Explanation: Osmosis is the diffusion of water where molecules of water move passively (without energy) from high concentration to low concentration. A good example would be the way water rushes into a sponge, when a dry sponge is placed in a pan of water. Water fills the empty spaces of the sponge until the concentration in and out of the ...
Diffusion is the movement of chemical molecules across a membrane based on differences between concentration gradients on either side of the membrane. Diffusion is particularly used in the transport of salts.
Osmosis refers to the transport of water into or out of cells. Osmosis can occur directly through the membrane of the cell, or through transport proteins called aquaporin. Here is a video which describes how osmosis impacts onion cells placed into tap water and then into a salt water solution.
The water potential gradient determines the direction of osmosis. It goes from high to low water potential. This is because n a high water potential area there is a bigger number of free water molecules. Free here means they are not attached to other solute molecules forming a hydration shell. This video discusses the changes which occur in plant cells when they are placed into hypertonic and ...
Diffusion is a direct result of the second law or entropy. The molecules spread out in all directions lowering the concentrations of he molecules in the original space. Osmosis is diffusion that is controlled by a membrane. The membrane allows diffusion in only one direction. Because of the size of the openings in the membrane small molecules ...
Osmosis occurs when there is a semi-permeable membrane separating two solutions of different concentrations of solute, causing water molecules to move from an area of lower solute concentration to ...