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using potassium permanganate as an example, explain in your own words how Brownian motion relates to diffusion
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- yeasts are able to produce high internal concentrations of glycerol to counteract the osmotic pressure of the surrounding media. suppose that a sample of yeast cells were placed in a 4% sodium chloride solution by weight. The density of solution is at 25 C = 1.02 g/ml, Molecular weight of solute = 58.44 g/mol, i of glycerol = 1 and R=0.08205 L-atm/mol-K What is the weight of solute in grams What is the moles of solute What is the volume of the solution in liters What is the molarity of the solution What is the value of the temperature to be used to solved for the osmotic pressure of the solution What is the osmotic pressure of solutionUsually , rates of diffusion vary inversely with molecular weights; so smaller molecules diffuse faster than do larger ones. In cells, however, calcium ion diffuses more slowly than does cAMP. Propose a possible explanation.Suppose you are determining the diffusion coefficient of the following molecule in a homogeneous liquid like water. List molecules in the order of higher diffusion coefficients assuming they are in the same solution. Provide justification. molecules: H2, vitamin C, 20-bp single stranded DNA, glucose oxidase protein
- Consider a solute having a permeability coefficient of 10-6 m s-1 for the plasma membrane of a cylindrical Chara cell that is 100 mm long and 1 mm in diameter. Assume that its concentration remains essentially uniform within the cell. Untitled Title A. How much time would it take for 90% of the solute to diffuse out into a large external solution initially devoid of that substance?* B. How much time would it take if diffusion occurred only at the two ends of the cell?* C. How would the times calculated in A and B change for 99% of the solute to diffuse out? D. How would the times change if Pj were 10-8 m s-1?*Diffusion and osmosis classification Classify the following characteristics based on whether they are describing diffusion, osmosis, or both. Diffusion Results in an Can occur with equal distribution of solute molecules or without a membrane Always involves the movement of water Requires a semi-permeable membrane Osmosis Involves the movement of gases, ions, and small water soluble molecules Passive form of movement that requires no energy Moves from areas of high concentration to low Both Diffusion and Osmosis Responsible for gas exchange in the lungs concentration A 3 of 15 Next > Cation to open the document "Epicinstaller-13.0.0-fortnite-a8e4f12cada646caa706d8be407be69f (3).msi". tv 22Suggest a reason why inorganic ions, such K+, Na+, Ca2+ and Mg2+, do not cross biological membranes by simple diffusion.
- Phospholipid lateral motion in membranes is characterized by a diffusion coefficient of about 1 x 10-8 cm2/sec. The distance traveled in the membrane in a given time is r = √4Dt, where r is the distance traveled in centimeters is the diffusion coefficient, and t is the time during which diffusion occurs. Calculate the distance (in nanometers) traveled by a phospholipid in a bilayer in 25 msec (milliseconds).Use the Stokes-Einstein equation to estimate the diffusion coefficient in m2/s and in um?/s for the following particles. Assume that the particles are immersed in water in a test tube at body temperature (37 °C), which has a viscosity of approximately 0.0007 kg m1 s1. Assume the particles are all spherical Particle Diameter ATP 1.4 nm Eukaryotic ribosome 25 nm SARS-COV-2 100 nmFor this practice problem, would the answer be c)NaCl? My reasoning behind this is because molecules under 100 Da can use simple diffusion, while nonpolar molecules and larger molecules like benzene can use channels via facilitated diffusion. However, NaCl dissociates into ions and cannot readily use diffusion?
- If you made a hematocrit in two tubes. Tube A is made of 0.60M NaCl, and Tube B is made of 1.00M of NaCl, describe how the cell would respond in these solutions? Which would have a higher rate of osmosis? If the cell is permeable to NaCl, which would have a higher rate of diffusion?A red blood cell has an internal salt concentration of ∼150 mM. The cell is placed in a beaker of 500 mM salt. Solve, (a) Assuming the cell membrane is permeable to water but not to ions, describe what will happen to the cell in terms of osmosis. (b) If the membrane were permeable to ions, in which direction would solutes diff use: into or out of the cell?Identify and explain two examples of diffusion you have experienced. Provide specific details in your explanation relating to the concept of diffusion