3. What is the difference between osmosis and diffusion? Checkpoint Tonicity For each of the following diagrams, determine the tonicity of the solution. In other words, decide if the solution is hypertonic, hypotonic, isotonic. Assume the solute cannot diffuse across the membrane. What is the tonicity of this solution? Justify your answer. 60% solute 10% solute 40% water 90% water What is the tonicity of this solution? Justify your answer. 50% solute S0% solute Diffusion, Osmosis, and Tonicity What is the tonicity of this solution? Justify your answer. 20% solute 60% solute 80% water 40% water

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.