During the osmosis experiment, when sodium chloride was added to the left beaker and the 50 MWCO dialysis membrane was used, no osmotic pressure was recorded. Why? • sodium is able to diffuse through the pores no sodium was added the sodium concentration was too low Osodium as too small to generate pressure
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The membrane allows the solvent (usually water) to pass through but restricts the passage of the solute. Show more…
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Why do you think there is no pressure change? Sodium is too small to generate pressure Sodium is able to diffuse through the pores The sodium concentration is too low No sodium was added
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Explain the patterns of diffusion you observed. When the 50 MWCO membrane was in place, why was NaCl (MW = 57) able to diffuse through? 2. Osmosis, simple diffusion, and filtration are all forms of passive transport. What is the difference between filtration of water and osmosis? Filtration of solute and simple diffusion? 3. Do different solutes generate different osmotic pressures? Why or why not? 4. Imagine a situation where two beakers are filled with a solution and separated by a 100 MWCO membrane. The beaker on the left contains a 10 mM NaCl solution, and the beaker on the right contains deionized water. The solutions are allowed to equilibrate for 5 minutes. At the end of the 5 minutes, the NaCl concentration in the right beaker is 7 mM. Calculate the ADR.
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