Question

QUESTIONS 1. What is the difference between diffusion and osmosis? om one Slace to an to we movement OP water aaross ca membiane is the solute and the 2. In a salt water solution, the is the solvent. Part A: The Effect of Concentration on Rate of Diffusion 3. Based on your results, how does the concentration of a solute affect its rate of diffusion? Part B: The Effect of Molecular Weight on Rate of Diffusion 4. Based on your results, how does the molecular weight of a solute affect its rate of dif- fusion? Part C: The Effect of Molecular Size on Diffusion Across a Membrane 5. Based on your results, how does the molecular size of a solute affect its ability to diffuse across a selectively permeable membrane?

Answer 1

1- Diffusion is the movement of gas, solid or liquid particles from higher concentration to lower concentration where as osmosis is a special type of diffusion in which the movement of solvent occurs from higher to lower concentration.

Osmosis require semipermeable membrane where as diffusion does not require semipermeable membrane.

2- In salt water solution,  salt is solute and water is solvent.

3- with increase in concentration of solute, the rate of diffusion of solute is increased because higher concentration gradient is created by increase in solute concentration.

4- With increase in molecular weight, diffusion process is decreased.

5-Smaller the size of solute, faster the process of diffusion because smaller particle can move faster in diffusion process. Larger the size of solute particle, slower the diffusion rate.