is equal to the osmotic pressure causing the osmosis. Drinking water is often pu
ID: 3509683 • Letter: I
Question
is equal to the osmotic pressure causing the osmosis. Drinking water is often purified by reverse osmosis, a process in which the pressure applied to arm B is greater than the osmotic pressure. This increased external pressure forces water molecules across the membrane from right to left in Figure 3. As more and more water is forced into arm A, the concentration of solute molecules in that arm gets lower and lower until at some point the solute concentration is so low that we consider the wa- ter to be pure The following experiment demonstrates the movement of materials through dialysis tubing. Like a plasma membrane, dial- ysis tubing is selectively permeable. Small pores in the tubing al- low the passage of small particles but not large ones. -QUICKCHECK QUESTIONS 3.1 How is osmosis different from diffusion? 3.2 Which has a greater water concentration, a 1 percent solute solution or a 2 percent solute solution? 3.3 What is osmotic pressure? 41Explanation / Answer
Question: 3.1) How is osmosis different from diffusion?
Answer: Osmosis is the movement of water molecules across a semipermeable membrane from a region of higher concentration to one with lower concentration. Diffusion is the movement of molecules between two areas of different concentrations that occurs with or without a membrane.
Question: 3.2) Which has a greater water concentration, a 1 percent solute solution or a 2 percent solute solution?
Answer: Water concentration is greater in the solution in which the solute concentration is less. Hence the solution with 1 percent solute concentration has a greater water concentration.
Question: 3.3) What is osmotic pressure?
Answer: Osmotic pressure of a solution is the minimum pressure required to stop the osmosis.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.