3, 20% NaCl and 0.9% NaCl solutions are separated by a membrane that is only per

Question

3, 20% NaCl and 0.9% NaCl solutions are separated by a membrane that is only permeable to water. Predict the direction of net water flow in this system. Does this happen through diffusion or osmosis? 4. Review the Movement of Solutes Across a Selectively Permeable Membrane experiment. Explain why this was an experiment to investigate diffusion and not osmosis. Was osmosis also occurring? Before refrigeration it was a common practice to salt meat in order to prevent bacterial growth and decay. Propose an explanation for how this process prevented bacterial growth. . Laboratory 6 0smosis and Diffusion

Explanation / Answer

3. The flow of solvent (water) would be from 0.9% NaCl to 20% NaCl solution through a semipermeable membrane, until this flow equalize the solute concentrations on the two sides. This process occurs due to the osmosis.

4. The diffusion takes place with the salt concentrations, diffusion occurs from the higher concentration of the solute to lower concentration of solute, means the molecules of NaCl would be moving from the 20% to 0.9% of NaCl. Yes, the osmosis would also be occurring simultaneously with the solvent until the equilibrium is met.

5. Salt creates hypertonic condition, which causes exocytosis of water from bacterial cells, the cells lose water until they reach a state where they cannot grow anymore. Thus addition of salt inhibits the growth of microorganisms. Also rubbing the salt make meat dehydrated which makes meat inhabitable for bacterial growth.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.