Material and Methods * Two beakers * Membrane holder * Four Dialysis membranes: 20 (MWCO)‚ 50 (MWCO)‚ 100 (MWCO)‚ 200 (MWCO). * Membrane barrier * Four solutes: NaCl‚ Urea‚ Albumin‚ Glucose * Solution dispenser * Deionized Water * Beaker Flush * Timer * Computerized Simulator Using the computerized simulator‚ the first step of the first experiment‚ you must place the 20 (MWCO)
Free Molecular diffusion Diffusion Osmosis
the largest pore size? MWCO in terms of pore size : the larger the MWCO number‚ the larger the pores in the membranes. 4/ Avogadro’s number is a constant for the number of : molecules Experiments 20 MWCO : Na+Cl- no diffuse ; Urea no diffuse (9.00 mM) 1/ The reason sodium chloride didn’t diffuse left to right is that : - the membrane pore size was too small 2/ The molecular weight of urea is 60.07 . Do you think urea will diffuse through the 20 MWCO membrane? No‚ not
Free Diffusion Molecular diffusion Molecule
1) Hypertonic refers to _______. 1) _______ A) the concentration of solutes that a cell is bathed in B) a concentration of solutes that is less than the solutes inside the cell C) the concentration of solutes inside a cell D) a solution that will cause a cell to swell 2) What happens to facilitated diffusion when the protein carriers become saturated? 2) _______ A) ATP will be utilized for transport. B)
Premium Diffusion Osmosis Molecular diffusion
Materials and methods: * 20 mwco dialysis membrane * 50 mwco dialysis membrane * 100 mwco dialysis membrane * 200 mwco dialysis membrane * Membrane holder * NaCl concentration * Urea * Albumin * Glucose * Deionized water * Beakers The experiment wasn’t done in an actual lab‚ but rather using a computer simulation in order to achieve precision and save time. Results: At 20 MWCO ‚NaCl (9.00 mM) no diffusion occurred . At 50 MWCO‚ NaCl(9.00 mM) diffusion
Free Diffusion Molecular diffusion Osmosis
through? |D | |50 MWCO membrane | | |100 MWCO membrane | | |200 MWCO membrane
Premium Diffusion Osmosis Molecular diffusion
Dialysis (Simple Diffusion) Answers 1. The molecular weight of urea is approximately 60. Which of the membranes can it pass through? a. 50 MWCO membrane b. 100 MWCO membrane c. 200 MWCO membrane d. Both the 100 and 200 MWCO membranes D. Both the 100 and 200 MWCO membranes 2. True or False: A solution containing glucose will diffuse faster through a 200 MWCO membrane if it is heated. True 3. The molecular weight of carbon C is 12; the molecular weight of hydrogen (H) is 1; the molecular weight
Premium Diffusion Molecular diffusion Osmosis
Lab Report #1 Introduction A cell’s plasma membrane is known to be selectively permeable. This implies that the membrane is selective on what substances can pass in and out of the cell. There are two methods of transport that occur through the plasma membrane. One method of transport is called active process which uses ATP energy to transport substances through the membrane. The other method is called passive process which does not require the use of ATP energy. During passive processes
Free Diffusion Molecular diffusion Solution
mosis Did you observe any pressure changes during this experiment? If so‚ in which beaker(s)‚ and with which membranes? In the L beaker with the 20 MWCO Membrane‚ the pressure went up. Why? Because no diffusion took place. Did the Na?/Cl? diffuse from the left beaker to the right beaker? If so‚ with which membrane(s)? Yes‚ 50‚ 100‚ and 200 MWCO Why? Because diffusion took place. Explain the relationship between solute concentration and osmotic pressure. They are directly proportional‚ if the
Premium Osmosis Concentration Solution
to diffuse through 20 MWCO? How well did the results compare with your predictions? The urea was not able to diffuse through the 20 MWCO because the membrane pores are too small and the urea molecules are large. The molecular weight of Urea is 60.07 g/mol which is too large thus the molecules were not able to pass through the pores of the 20 MWCO. The results that I obtained from the experiment agreed with these predictions because urea was no able to diffuse through the 20 MWCO. 3. Describe
Premium Diffusion Osmosis Molecular diffusion
11M01_ZAO2177_01_SE_CH01.QXD 3/4/11 1:36 AM Page 1 E X E R C I S E 1 Cell Transport Mechanisms and Permeability P R E - L A B Q U I Z 1. Circle the correct term. A passive process‚ diffusion / osmosis is the movement of solute molecules from an area of greater concentration to an area of lesser concentration. 2. A solution surrounding a cell is hypertonic if: a. it contains fewer nonpenetrating solute particles than the interior of the cell. b. it contains
Premium Osmosis Diffusion Molecular diffusion