A membrane that does not allow substances through is impermeable.
One that allows some substances, but not others, is semipermeable or selectively permeable.
Permiable
Osmosis is the diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated solution (of the solute) through a membrane that is permeable to the solvent.
# a physical chemistry,cell biology. ------------------------------ Movement of solvent through a semipermeable membrane so as to equalize the concentration of solute across the membrane.
I don't think that question has one answer, considering how vast the field molecular science is and there are many things to consider, but I think what your looking for is "osmosis". The process in which a solvent (generally water) moves through a mostly permeable membrane (permeable to the solvent not to the solute) from a high solute concentration to a low solute concentration without energy inputs of any kind separating two solutions of different concentrates. hope this helps.
reverse osmosismay be define as a separation operation involve transfer by concentration gradient of a solvent through membrane in to a mixture solute and solvent , the transfer of solvent in the opposite direction is effected by imposing the pressure . is known as reverse osmosis
"Osmosis is the diffusion of a solvent (frequently water) through a semi-permeable membrane, from a solution of low solute concentration (high water potential) to a solution with high solute concentration (low water potential), up a solute concentration gradient."
depends on type of membrane 1) semi-permeable membrane - allows only solvent molecule to pass ex. parchment paper 2) permeable membrane - allows both solvent and solute molecules to pass ex. filter paper 3) selectively permeable membrane - allows solvent molecules and some of selected solute molecules to pass ex. plasma membrane
Osmosis is the tendency of a solvent to travel across a semipermeable membrane (Semipermeable membrane- a membrane that allows some molecules to pass through but does not allow other molecules to pass through) into areas of higher solute concentration. Diffusion is the random motion of molecules from an area of high concentration to an area of low concentration.
The first step in the dissolving process is "The solvent molecules surround the solute particles".
Osmosis is the diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated solution (of the solute) through a membrane that is permeable to the solvent.
when solute is dissolved in a solvent...the molecules of the solute starts diffusing between the particles of the solute.
The process if solute disappearing into solvent is called dissolving. This means that the solute and solvent are of like polarity or the solute was broken up into ions.
Because diffusion is the movement of solute particles while osmosis is the movement of solvent molecules through a semipermeable membrane.
Osmosis is the diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated solution (of the solute) through a membrane that is permeable to the solvent.
The energy of molecules in a solute and solvent can be increased by adding outside energy, say, heat, for instance.
The boiling point rises and the freezing point lowers.The reason being, when a solute dissolves in a solvent, the solute molecules wedge themselves between the solvent molecules. In order for the solvent to freeze, its molecules have to get close enough together to form a solid. However, the solute molecules are in the way. As a result, it requires much colder temperatures for the solvent molecules to form a solid, despite the hindrance of the solute's molecules. The same sort of thing happens when trying to boil the solvent, only instead of holding the solvent molecules apart, the solute molecules end up holding them together, preventing them from boiling. Therefore, a more energy is needed to break the bond between solvent and solute, which allows the solvent to boil.
Solvent
is the movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, aiming to equalize the solute concentrations on the two sides. It may also be used to describe a physical process in which any solvent moves, without input of energy, across a semipermeable membrane (permeable to the solvent, but not the solute) separating two solutions of different concentrations.Although osmosis does not require input of energy, it does use kinetic energy and can be made to do work.