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In this essay we will discuss about: Definition of Osmosis 2. Types of Osmosis 3. Osmotic Relations of Plant Cells.
The chemical potential of water is also called water potential. The net force or gradient is determined by the difference in the water potentials of solutions separated by a semipermeable membrane. A solution which can cause an osmotic entry of water into it is said to be osmotically active solution.
It possesses a low water potential. Diffusion of water into it will continue across the separating membrane till an equilibrium is reached. At equilibrium water potential becomes equal on both sides of the membrane. Osmosis is a special type of diffusion of water that occurs through a semipermeable membrane.
Solute particles decrease the chemical potential of water by decreasing the mole fraction of water.
In osmosis, a semipermeable membrane separates say dilute solution A and concentrated solution B. Solute particles cannot pass through the semipermeable membrane.
There is, therefore, a net diffusion of water from its higher chemical potential dilute potential to its lower chemical potential concentrated solution.
Osmosis is of two types: The osmotic entry of water into a cell, organ or system ii Exosmosis: The osmotic withdrawal of water from a cell, organ or system.
It is maximum pressure which can develop in an osmotically active solution when it is separated from its pure solvent by a semipermeable membrane under ideal conditions of osmosis that do not allow dilution of solution.
Osmotic pressure is also defined as the pressure required to completely stop the entry of water into an osmotically active solution across a semipermeable membrane Fig. The instrument used for measuring osmotic pressure is called osmometer, e.
Aquatic plants have an osmotic pressure of atm, mesophytes 5—15 atm while in xerophytes it lies between atm but goes up to 60 atm under drought conditions. Upper leaves have more osmotic pressure than the lower leaves.Osmosis, a specific kind of diffusion with respect to water takes place in the cells.
This kind of diffusion is where water moves through a selectively permeable membrane, that Is, a membrane that only allows specific molecules to pass through. Research Question: Diffusion and Osmosis Lab Essay Examining Diffusion and Osmosis Introduction: Purpose: 1.
To simulate and observe the diffusion of solutes and the osmosis of water through a semipermeable membrane through color change and sugar tests.
2. To speculate osmosis.
Our data and results can be applied to the further studies of osmosis and diffusion, especially to passive transport in human cells. Cite This Essay To export a reference to this article please select a referencing stye below. Osmosis and Diffusion Lab Essay Sample. The purpose of this lab was to observe the rate of osmosis and diffusion, as well as the effect of molecular size of the particles on this rate.
Part I of the lab was a demonstration of osmosis and diffusion, that dealt with raisins in different liquid environments, each with a different concentration of. - Osmosis in Carrots Background Osmosis is the diffusion of water from a dilute solution to a more concentrated solution through a partially permeable membrane, which allows the pass of water molecules but not solute molecules.
Osmosis and Diffusion Essay examples Diffusion and Osmosis in an egg Low concentration Diffusion is the process of molecules spreading from areas of high concentration to .