correctly answered: d. 200 MWCO 4. Avogadro’s number is a constant for the number of You correctly answered: b. molecules. 06/17/14 page 1 Experiment Results Predict Question: Predict Question 1: The molecular weight of urea is 60.07. Do you think urea will diffuse through the 20 MWCO membrane? Your answer : c. No‚ not at all. Predict Question 2: Recall that glucose is a monosaccharide‚ albumin is a protein with 607 amino acids‚ and the average molecular weight of a single amino
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increasing the concentration of sodium chloride from 9 mM to 18 mM in the left beaker was to You correctly answered: b. increase the rate of diffusion. 2. Describe the difference between the rate of diffusion seen for sodium and urea. You correctly answered: c. Urea diffused more slowly because it is larger than sodium. 3. Which of the following solutes did not pass through any of the membranes? You correctly answered: b. albumin 4. When diffusion stops‚ we say the solution has reached You
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Urine production If body fluids are hypo osmolar‚ then kidney will produces hypo osmolar urine. (Dilute urine) If body fluids are hyper osmolar (dehydration) then kidney produces hyperosmolar urine. (concentrated urine) In the renal cortex the osmolarity of interstitial fluid is 300mOs/L going to 1200mOs/L in the papilla. From the cortex to the papilla there is an increasing hyper osmolarity of the interstitial fluid. Cortico papillary osmolarity gradient. Urine with osmolarity more than 300mOs/l
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Experiment No. 1: MELTING POINT AND BOILING POINTS OF ORGANIC COMPOUNDS ABSTRACT The properties of organic compounds depend on their chemical structures. Intermolecular forces of attraction affect physical properties such as melting and boiling point. Through the Thomas Hoover apparatus‚ the melting point of 8 test compounds was determined. Salicylic acid exhibited the highest melting point while naphthalene‚ the lowest. The stronger the intermolecular forces of attraction‚ the higher the melting
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Review Sheet Results 1. Describe two variables that affect the rate of diffusion. Your answer: Increasing the number of membrane carriers and the concentration. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? Your answer: Because Urea was too big to pass through the 20 MWCO membrane 3. Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare
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Introduction The purpose of the experiment was to determine the melting points of compounds using a Mel-Temp device. The melting point of naphthalene‚ urea‚ and sulfanilamide are found. This is then followed by the measuring of an unknown compound‚ and an impure sample (a small amount of naphthalene mixed with the unknown). Experiment In the lab‚ the height of the chemical in the capillary was set to 2-3 mm thickness. The voltage at the Mel-Temp started at a low setting of 1.5-2. The heat was
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Mechanisms and Permeability Name Lab Time/Date ___ Activity 1 Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. Size of material and concentration 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? The molecules were too large to pass through. This is what I predicted on my Hypothesis. 3. Describe the results of the
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(cystine)‚ sugar (sucrose)‚ urea‚ soda lime‚ 1% sodium hydroxide‚ hydrochloric acid‚ 5% lead acetate Procedure A: Testing for Carbon‚ Hydrogen and Oxygen 1. 1g of sugar (sucrose) was placed in a dry test tube. 2. The test tube was heated in an inclined position. 3. Observations were recorded. 4. The test tube was heated until no further change was observed. Procedure B: Testing for Nitrogen 1. 1g of urea and 1g of soda lime was mixed
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protein. | 100% | | | C. | urea. | | | | D. | ammonia. | | | | | Score: | 0.1/0.1 | | | 2. | Quest#2 | | Ammonia is converted to urea in the: | | | Student Response | Value | Correct Answer | Feedback | A. | heart. | | | | B. | brain. | | | | C. | kidney. | | | | D. | liver. | 100% | | | | Score: | 0.1/0.1 | | | 3. | Quest#3 | | Which of the following statements about the urea cycle is CORRECT? | | | Student
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Urea: 20g/L 2. Na2HPO4: 9.5g/L 3. KH2PO4: 9.1g/L 4. Yeast Extract: 0.1 g/L 5. Phenol Red: 0.01g/L 6. Agar: 15g/L Slants were prepared and cultures showing precipitation were streaked on slants and incubated at 37 C. Change in color was visible at 5 day
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