Dec 06, 2010 · Step-By-Step Procedure. 1. Fit a semi-permeable membrane carefully over the mouth of a thistle-funnel with the help of strong twine. 2. Invert the funnel so that the covered mouth is at the bottom and fill the cup of the funnel with concentrated sugar solution. 3.
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- 1. Place 10 drops of the solution surrounding the dialysis tubing into a labeled test tube. 2. Add 2 drops of Benedict's solution to each tube. 3. Place the tubes in boiling water for 5 minutes. Use a test tube holder to place the tubes in the boiling water and to remove them. 4. If glucose is present, a yellow, orange or red color will appear.
Strengthen your understanding with over 8,000 Osmosis case questions for USMLE® Step 1, USMLE® Step 2, COMLEX-USA® OMM, and NCLEX-RN®. Each Osmosis question comes with a detailed answer explanation that is carefully written and reviewed by health professionals, who have in-depth knowledge of how you're expected to think for the boards.
- The level of sugar solution increases in the pipette gradually. The rate of this increase declines with time. A positive test for glucose (a brick red ppt.) is obtained when an aliquot of water from the beaker is tested with Fehling solution (Mix Fehling A containing 35gm GUSO 4 plus 500 ml water, and Fehling B containing 50gm NaOH plus 173gm Rochelle salt plus 500 ml water, in equal ...
The opening of the wide end has been covered with a semipermeable membrane and immersed in water. As water crosses the membrane and dilutes the molasses, the volume of fluid inside the thistle tube increases, and a column of fluid ascends the thin part of the tube. You can measure the rate of its ascent.
- A simple osmometer has been set up before lab and the initial height of the column marked and the starting time has been noted; measure the height of the column approximately each 15 minutes and record it on your data sheet under the proper time interval: Activity 6Diffusion in Agar Gel 1. Obtain a Petri dish with agar gel.
Make 3 sugar solutions, one 40%, and one 10%. Set up 5 artificial cells. Into cell #1 put some of the 40% solution, into cell #2 the 20% solution, into cell #3 the 10% solution, and into cell #4 and cell #5 put distilled water. Take the 5 beakers.
- Measure and record the amount of fluid in each 'cell' (tube). Measure and record the amount of water in each measuring cylinder. For Cylinder A, test the water for glucose using a 'clinistik' strip. For Cylinder B, test for sucrose by removing a small amount of the water, then add 5mL of HCl then 5mL of NaOH. What happens?
It's a few thousand Step 1 questions and over 10k Step 2 questions. The questions are good, every option is explained, and everything is hyperlinked to its concept library page. Integration: This is really the strongest thing about Osmosis - it attempts to integrate pretty much everything you're doing into one central platform.
- Petri dishes and test tubes • 2% agar with phenolphthalein. preparation. Step 1: Place some phenolphthalein in two test tubes. Add 0.1 M HCl to one test tube, swirl to mix the solutions, and observe the color. Using the same procedure, add 0.1 M NaOH to the other test tube. Remember to record your observations as you were instructed.
• For this measurement, the first and second known digits are 4.5. • Because the line ends on a mark, the estimated digit in the hundredths place is 0. • This measurement is reported as 4.50 cm. Significant Figures in Measured Numbers • obtained from a measurement include all of the known digits plus the estimated digit.
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a standpipe piezometer by measuring the height of the water surface in the tube relative to a common datum. The hydraulic head can be used to determine The hydraulic head can be used to determine Air flow meter (531 words) [view diff] case mismatch in snippet view article find links to article