the Percentages of Naphthalene‚ NaCl and SiO2 in a Mixture with the use of Separation Techniques Castro‚ Sarleen G.* Cid‚ John Emmanuel V.‚ Clemente‚ Christian Joy G. Group 5‚ 1CHEM‚ Department of Chemistry‚ College of Science‚ University of Santo Tomas‚ España‚ Manila‚ 1015 August 24‚ 2012 Abstract A mixture can be homogenous or heterogenous‚ depending if the mixture has been uniform throughout the mixture or not. One of the objectives is to separate C10H8‚ NaCl and SiO2‚ and determine their percentages
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lab is to measure urinary glucose (a known and unknown sample) using two quantitative tests: colorimetric strip test and o-toluidine test. Urinary glucose is the main focus for this lab due to its involvement with diabetes‚ a disease defined by the abnormal regulation of insulin. The most effective method for monitoring glucose is through blood glucose compared to urinary glucose. It has been discovered that urinary glucose is not a good measure of changes in blood glucose because: (1) the bladder
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Lab Report Purpose: Osmosis and diffusion through potato core in different concentration (viable) : The concentration of solution in a solution will affect the movement of water across potato cell membrane Material: Potato core Sucrose solution (0.2‚0.4‚0.6‚0.8‚1.0) Electronic Balane Test tube and rack Scalpel Plastic Weighing tray Cork Borers Method: Day 1 use you cork borers to bore 6 vertical hole on your potato. remove the potato cylinders from
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The movement of water down its osmotic gradient across a selectively permeable membrane is known as osmosis. The difference in the concentrations of solutes on either side of the membrane results in the establishment of an osmotic pressure. Water follows the direction of solutes‚ this means that in the event where there are more solutes outside the cell than there are inside the cell‚ water will move from the inside of the cell to the outside in order to establish water balance. When a cell is placed
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Osmosis Lab Report by Evan Gerber Claire Cambron First Lab Report Wednesday 10:30am February 20‚ 2013 Theresa Gburek Abstract The major objective of the experiment was to test the effect of the concentration gradient on the diffusion rate. It was hypothesized that the greater the stronger the concentration gradient‚ the faster the rate of diffusion would be. To test this‚ dialysis tubes were submerged in different concentration fructose solutions. We weighed the tubes at specific
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Abstract: Osmosis is the transport of water across a selectively permeable membrane from a region of a higher water chemical potential to a region of lower water chemical potential. (Tzahi 2006) To demonstrate osmosis lab‚ artificial cells were made with various sucrose concentrations and were placed into beakers of different sucrose solutions. Overall the results showed that the higher percentage of concentration gradient of sucrose‚ the more the artificial cells absorbed. Introduction: The
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* Recommendation Report: The Wallace Group Management Mrs. LaBoore Terrell September 2‚ 2006 Recommendation Report: The Wallace Group This paper will address the issues with the management style... Premium * Recommendation Report for in-class peer review on Monday‚ December 2. The final draft of your recommendation report is due by 6pm on Friday‚ December 6. Directions for Submission: You... Premium * Recommendation Report Wdf operational parts are treated in the conclusions and recommendations
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Osmosis Osmosis is just a special case of diffusion - where water diffuses through a membrane which has different concentrations on either side. Permeable means "allows anything to pass through". Membranes in cells allow small molecules (water) to pass through‚ but prevent bigger ones from passing. This is called "selectively permeable". Take a look at the following animation; If a selectively permeable membrane separates the two solutions‚ water moves through it in both directions at
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The purpose of this lab was to observe the rate of osmosis and diffusion‚ as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion‚ that dealt with raisins in different liquid environments‚ each with a different concentration of sugar. Part IV of the lab was using the same idea as the demonstration‚ by putting objects in different concentrations of a substance; in this case elodea leaves in salt water. In both cases‚ the
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Osmosis/Plasmolysis Lab Name: Problem: How do solutions of various salt concentrations influence osmosis in relation to an onion cell? Materials: (per student group): red onion epidermis forceps‚ dropper distilled water NaCl solution paper towels microscope slide cover slip Procedure 1. Make a wet mount of the red onion epidermis. 2. Examine under low power. When you have a clear view of several cells‚ switch to high power. Make a labeled drawing
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