. Please 1) explain why osmotic potential of solution is always negative; and 2)
there are two solutions (A and B). A has an osmotic potential of -50kPa, and
solution B has an osmotic potential of -75kPa. When these two solutions are
separated by a semi-permeable membrane, please discuss the direction osmosis.
Osmotic potential may be defined as:- The potential of water molecules to move from a hypotonic solution (more water, less solutes) to a hypertonic solution (less water, more solutes) across a semi permeable membrane.
A measure of the potential of water to move between regions of
differing concentrations across a water-permeable membrane by using
this formula: ψπ = − C R T, where
ψπ is the osmotic potential,
C is the concentration of solutes,
R is the universal gas constant (i.e.
8.314472 J K−1 mol−1), and T is the
absolute temperature.
A pure water contains no solutes, thus, it should have zero (0) water potential. And also for this reason, the value of osmotic potential of a solution is always negative since the presence of solutes will always make a solution have less water than the same volume of pure water.
In application, when two solutions are isotonic the osmotic
potentials will be equal, and there will be no net movement of
water molecules. When different, the solution that is hypotonic
(diluted solution, less solutes more water) will have higher
osmotic potential (less negative ψπ ) whereas the solution that is
hypertonic (concentrated solution, more solutes less water) will
have lower osmotic potential (more negative ψπ). Difference in
osmotic potentials will cause water molecules to move from a
hypotonic solution to a hypertonic solution.
The osmotic potential is a measure of the tendency of a solution
to withdraw water from pure water by osmosis across a
differentially permeable membrane. Net diffusion of water occurs
from regions of less negative potential to ones of more negative
(or lower) potential and continues until the potentials become
equal.
If a living cell is surrounded by a more concentrated solution
(with more negative osmotic potential, the cell (hypotonic) will
tend to lose water to the surrounding environment.
... In osmosis, water molecules
move down the water potential gradient, from a
high water potential to a lower water potential.
. Please 1) explain why osmotic potential of solution is always negative; and 2) there are...
Questions I a) What is osmosis? b) What is dialysis? Can MgSO4 pass through? Explain. 2. Can starch pass through a dialyzing membrane? (Support your claim with evidence from the experiment.) 3. Explain why people who are adrift in a lifeboat without a supply of fresh water are advised not to drink ocean water. note - Ocean water is saltier than body fluids like blood plasma. 4. In terms of osmosis, what happens when fresh water is inhaled into a...
7. Which of the following solutions is isotonic (no osmosis) with a 0.30 M NaNO, solution? {hint - Find the osmosis molarity or "osmolarity" = (# ions)M} a) 0.10 M CaCl2 b) 0.30 M glucose c) 0.60 M NaCl d) 0.15 M AICI; e) 0.75 M KCI (n-1 for glucose) 8. If a solution of 0.20 M Mg(NO3)2 is separated from a 0.25 M KCl solution by a membrane that is permeable to water, osmosis will occur. Describe the osmotic...
Consider two solutions with the following molarities, separated by a semi-permeable membrane: Solution A: 0.25 M NaCl Solution B: 0.05 M NaCl In which direction will water diffuse?
Please answer the following questions for numbers 7-9. If you
are not sure please write it next to the problem number. I am a
little confused with these. I will rate good!
. If the membrane shown in the beakers below is only permeable to Na", and the beaker on the left epresents the initial state, which of the following will occur over time? Na A, a. Na will diffuse to the left side of the membrane, causing a net...
2-27. What volume of a 6.0%(m/V) solution of ethanol contains 30 g of ethanol A) 6,0 mL B) 10.ml C) 50 mL D) 5.0 mL E) 30.ml 7 2-28. How many 1:10 serial dilutions are needed to prepare a pH 4 solution from 0.1 M hydrochloric acid A) 1 B) 2 C) 3 D) 4 E) 5 2-29. How many grams of glucose should be weighed out to make 1 liter of a rehydration solution that contains 75 mmol of...
1) A semi-permeable membrane defines a “cell” containing a 10 mM NaCl, 5 mM KCl. This “cell” is placed into a bath containing a 6 mM CaCl2 and 6 mM NaCl solution. a) Draw a schematic of the scenario. b) Calculate the osmotic pressure of each solution. c) Characterize the osmolarity of the bathing solution to the cell. d) Which of the solutes are permeants? non-permeants? e) Characterize the tonicity of the solution to the cell. f) Does osmosis occur?...
Quiz 3 Bios 240 1. Two solutions are separated by a semipermeable membrane that is permeable to sodium but not chloride or potassium ions. Solution A on the left contains a solution that is 100 mM NaCI, while Solution B on the right has a concentration of sodium chloride of 1 mM. There is an electrode in both solutions, and a comparative assessment of voltages between the two compartments is being made. The investigator doing the study decides to call...
Need help with this
QUESTION 1 Solution A has 40% sucrose and Solution B has 20% sucrose. Which solution has a higher concentration of water? a. Solution A b. Solution B OC Cannot tell with information given QUESTION 2 Consider the solutions above. In which direction would water move through a semi-permeable membrane? a. A to B Ob. B to A C. The concentration of water will remain the same QUESTION 3 Again, consider the solutions above. What is serving...
Instead of discussing osmosis in terms of water concentration, we often speak of the "water potential" of a solution. Considering that the units of pressure are Pascals, which are Newtons per meter squared (1 Pa = 1 N/m?), we can also write the units of pressure in terms of units of energy as an energy density (1 Pa = 1 N/m² = 1 J/mº) since a Joule equals a Newton*meter. Hence, we can speak of the concentration of the water...
how to show that?
plz explain detail
5. In this problem, we will demonstrate that entropy always increases when there is a materal flow from a region of higher concentration to one of lower concentration. Consider a two- compartment system enclosed by rigid, impermeable, adiabatic walls, and let the two compartments be separated by a rigid, insulating, but permeable wall. We assume that the two compartments are in equilibrium but that they are not in equilibrium with each other. Then,...