however‚ deals solely with water. Osmotic pressure is the pressure of a solution against a semi-permeable membrane to prevent water from flowing into the membrane. In this lab‚ we are going to study tonicity; tonicity is the measure of this osmotic pressure and is the differential of pressure between two solutions separated by a selective membrane. To help identify the relative concentrations of solute particles of different solutions‚ we must understand that there are three possible differences in concentrations
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permeable membrane. The aim of the experiment is to investigate the effect the salinity of solutions has on the process of osmosis and net weight gain/ loss by potato cells. This would be done by using similar size potato cubes and covering them with different concentrations of saline solutions (0.5% and 2.0%) in beakers then measuring the change in weight of the potato cubes. If the salinity of the solution is high then the weight of the potato cubes will decrease. Materials • 9 X 2cm2 potato cubes
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bag. They then rubbed the other end of the bag to open it up and then are able to fill the bag with solution. The next step of the lab was to test for the presence of glucose in a 15% glucose and 1% starch. Then they took the 15% glucose and 1% starch and took 15 mL and placed them in enclosed bags. Jaydon‚ Jacob and Tyler then tie off the bag leaving room for expandable contents in the solution. Then they took distilled water and filled it with 250 mL beaker or one other option includes filling
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radish extract in exterminating household’s pests such as ants. Furthermore‚ the study aims to create the most effective radish extract solution in terminating pests. B. Application The study’s product aims to be applied as a pesticide. It tends to provide an alternative for the current pesticide in the market. It aims to create an environment friendly solution for minimizing household’s pests. C. Materials 1. Mortar and Pestle 2. Bottle sprayer 3. Bowl 4. Clean Cloth 5. Radish 6. Water
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THE AFFECTS OF DIFFERENT SUCROSE SOLUTIONS ON OSMOSIS OF EGG MEMBRANES A laboratory report submitted for LE@D Biology 1004 Michele Liveley Arkansas State University Mountain Home Mountain Home‚ AR September 2013 Osmosis Egg Lab Report Introduction Osmosis is the passing of water or other solutions from an area of high concentration of particles to an area of less concentration. The cell membrane is an organelle‚ selectively permeable‚ and only
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Chemistry Unit 2 Area of Study: 1: Water Chapter 11: Measuring solubility Measuring Solubility Solubility: the maximum amount of that substance that can be dissolved in a that temperature Saturated solution: a solution which no more solute can be dissolved at that temperature Measuring solubility Determine the maximum mass of solute that can be dissolved in 100 grams of solvent at a particular temperature Worked Example A maximum of a 6g of solute can be dissolved in 20g of water at 20ºC
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test a liquid to see if it contains ions is to ________________________ ________________________________________________________________________ 3. Define a saturated solution ______________________________________________ ______________________________________________________________________ 4. Define an unsaturated solution __________________________________________ ______________________________________________________________________ 5. What is meant by solubility ? ____________________________________________
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A supersaturated solution is a solution that contains more dissolved substance than a saturated solution does. This occurs when a solution is prepared at a higher temperature and is then slowly cooled. This is a very unstable situation‚ so any disturbance causes precipitation. Solubility can be understood in terms of two factors: The natural tendency toward disorder favors dissolving. The relative forces between and within species must be considered. Stronger forces within solute species
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think drinking seawater killed the sailor faster than not drinking any water at all? Today we explore the cause of the sailor’s death. We’ll prepare solutions of salt water to represent the sea‚ and we’ll cut up slices of potato to represent the sailor. Potatoes are made of cells‚ as is the sailor! Objective: The concentration of solute in a solution will affect the movement
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so that a solution poured into the bag would not leak out. Next‚ the other side of the bag was opened. For step two‚ a 15% glucose/1% starch solution was tested for the presence of glucose with Benedict’s‚ and we recorded the data in a table. Using more 15% glucose/1% starch solution‚ 15 mL was placed in the dialysis bag. The other end was tied‚
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