Colligative Properties & Osmotic Pressure (Lab – Chapter 13) Introduction: In this lab‚ we are going to observe the difference in freezing point between pure water and salt water. We will also observe the permeability of an egg shell membrane and dialysis tubing‚ acting in place of a human cell‚ when placed into a hypertonic or hypotonic solution. We will observe the changes in size‚ shape‚ and characteristic. Materials and Methods: First we begin this experiment by making an ice bath in
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of Solutes and Water Across a Membrane Brittany Bacallao Nova Southeastern University Abstract: This experiment gave a visual understanding of osmosis and diffusion. The first experiment proved that solutes would move down a concentration gradient if permeable to the selective membrane. The second experiment proved different solute concentrations affect the movement of water‚ depending on the solute concentration inside the cell. The purpose of this lab was to look for different solutes that
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of investigation: The effect of solute concentration on osmosis in potatoes. Research question: What is the solute concentration of a potato? Hypothesis: Osmosis is the movement of water across the membrane from an area of high concentration to an area of low concentration. The osmosis continues until the solute concentrations are equal in both areas. In this experiment‚ we put pieces of potatoes into test tubes with sugar solutions of different concentrations and leave them there over night.
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Concentration of liquid foods is a fundamental operation in many food processes; it is completely different from dehydration. Usually‚ foods‚ which are concentrated‚ remain in the liquid state; while drying produces solid or semisolid foods with significantly lower water content. The concentration of liquid foods has three different methods; evaporation‚ membrane concentration‚ and freeze concentration. Evaporation usages gas liquid phase separation. It has the lowest capital cost and the maximum
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The effect of environmental factors such as temperature‚ osmotic pressure‚ oxygen concentration and pH on microbial growth and survival Abstract: Microbial growth can be affected by different environmental factors such as temperature‚ osmotic pressure‚ oxygen concentration and pH. Six experiments were carried out in this report testing for microbial growth against different environmental factors. Good aseptic techniques were used to prevent contamination‚ resulting in a uniform set of results
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Dialysis (Simple Diffusion). Which solute(s) were able to pass through the 20 MWCO membrane? None of the solutes were able to pass through the 20 MWCO membrane. A possible reason to why none of the of these solutes were able to pass through was because the solutes could have been too big to be transported. According to your results‚ which solute had the highest molecular weight? The solute that had the highest molecular weight was Albumin. Which solute displayed the highest rate of diffusion
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Variables Affecting Urine Output and Solute Concentration BIOL 204 505 Anatomy and Physiology II Author: Lab Partners: November 29‚ 2013 Purpose Three experiments were performed to determine the effect on Specific Gravity‚ NaCl Concentrations and Urine Output with the variables consisting of consuming water‚ salty chips‚ sports drink‚ diet and regular soda‚ and a control group which consumed nothing. Results Baseline Values and Chemstick Analysis Observation/Test Normal
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INTRODUCTION Osmosis is the movement of water molecules from high concentration to low concentration through semipermeable membranes‚ caused by the difference in concentrations on the two sides of a membrane (Rbowen‚ L.). It occurs in both animals and plants cells. In human bodies‚ the process of osmosis is primarily found in the kidneys‚ in the glomerulus. In plants‚ osmosis is carried out everywhere within the cells of the plant (World Book‚ 1997). This can be shown by an experiment with potato
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Materials 2011‚ 4‚ 845-856; doi:10.3390/ma4040845 OPEN ACCESS Article ISSN 1996-1944 www.mdpi.com/journal/materials materials Preparation‚ Characterization and Performance of Templated Silica Membranes in Non-Osmotic Desalination Bradley P. Ladewig 1‚2‚3‚ Ying Han Tan 4‚ Chun Xiang C. Lin 4‚ Katharina Ladewig 2‚3‚ João C. Diniz da Costa4 and Simon Smart 4‚* 1 2 3 4 Department of Chemical Engineering‚ Faculty of Engineering‚ Monash University‚ VIC 3800‚ Australia; E-Mail:
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Ankur Sindhu Sep 20‚ 2011 CHEM 182-DL1 Prof.: Dr. Nidhal Marashi Lab 1: Colligative Properties & Osmotic Pressure Purpose: The purpose of this laboratory was to gain an understanding of the differences between the freezing points of pure solvent to that of a solvent in a solution with a nonvolatile solute‚ and to compare the two. Secondly‚ osmosis was to be observed to gain a proper understanding of how the principal of dialysis functions. Procedure: 1. Make
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