starch can pass through the semi-permeable membrane‚ then the solution outside the dialysis tubing will turn black. -If iodine (IKI) can pass through the semi-permeable membrane‚ then the solution in the cup will turn black. Activity B: Osmosis -If sucrose molarity influences osmosis then % change in mass will increase as molarity increases. Materials * Dialysis tubing * Plastic cup * Glucose/starch solution * Distilled water * Iodine-potassium iodide (IKI) solution * Dropping
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EXPERIMENT REPORT (PREPARATION OF CdS) Experiment Purposes 1. To master the proper operations as well as the suitable situations of atmospheric pressure filtration‚ vacuum filtration‚ centrifugal separation & precipitation washing 2. To understand the relation between precipitation state % precipitating conditions 3. To learn the way to examine whether reactants are fully precipitated 4. To learn the principals of powder material synthesizing through room temperature solid phase method
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this lab is to understand how temperature influences the texture‚ and firmness of fondant‚ and fudge. Materials and Methods: The ingredients that were used for the fondant recipe were 200 grams of sucrose or better known as table sugar‚ and 118 mL of water. The 118 mL of water and 200 grams of sucrose was placed in a one quart saucepan on an induction stove top on the highest heat setting of 8‚ and a thermometer was placed in the pot while stirring the sugar and water with a wooden spoon. We kept
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method motioned in our lab manual pages 33-40 . In this experiment‚ the separation methods were decantation‚ filtration and evaporation and extraction and each is explained below: Decantation‚ this is the separation of liquid from a solid by careful pouring the supernatant liquid from the holding vessel without disturbing the solid at the bottom of the container. Filtration‚ Filtration is a mechanical or physical process to separate solid particulates from fluids. The solid remaining behind on
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In this lab‚ the class tested the effect of temperature on the rate of fermentation in yeast by measuring the height of CO2 produced in a graduated cylinder at varying degrees Celsius. Yeast can perform cellular respiration and fermentation‚ the first needing oxygen (aerobic) and the second not (anaerobic). Cellular respiration is the normal way human bodies’ make energy‚ but when lacking oxygen‚ cells undergo fermentation‚ which creates less energy than respiration‚ CO2‚ and lactic acid (though
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rashes‚ and increased blood sugar. The purpose of including niacin in Goldfish is because it enriches the crackers and makes it healthier. Sugar‚ Sucrose‚ is usually found in fruits‚ jams‚ soda‚ and sweets. Sucrose is commonly found as a white solid and tastes sweet. It’s chemical formula is C12H22O11 and it forms covalent bonds. The molecular weight of sucrose is 342.29648 g/mol and it’s melting point 185.5 °C. Some hazards include heart
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AP BIOLOGY CELL UNIT ACTIVITY #5 NAME_____________________ DATE___________HOUR_____ CELL TRANSPORT MEMBRANE PROPERTIES PASSIVE TRANSPORT CHARACTERISTICS: DIFFUSION: Cell Unit Activity #5 page 1 OSMOSIS : ISOTONIC ANIMAL CELLS Cell Unit Activity #5 page 2 HYPOTONIC HYPERTONIC PLANT CELLS OSMOREGULATION – ADAPTATIONS Paramecium Fresh Water Bony Fish FACILITATED D IFFUSION: Cell Unit Activity #5 page 3 Marine Bony Fish ACTIVE TRANSPORT CHARACTERISTICS:
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and carbon dioxide gas. This process is known as fermentation. There are various factors that affect the rate at which yeast respires. Aim To investigate the effect of concentration of table salt (sodium chloride) on the rate of fermentation of sucrose using yeast‚ measured in the volume of carbon dioxide gas collected over a period of 10 minutes. Research question What is the effect of concentration of table salt on rate of fermentation? Hypothesis I predict that as salt concentration is increased
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Water is never ’pure’ in a chemical sense. It contains various kinds of impurities such as dust particles‚ dissolved gases‚ dissolved minerals‚ microscopic paints and animals‚ suspended impurities and bacteria. These are natural impurities derived from the atmosphere‚ catchments area and soil. Besides this‚ there are various other reasons by which water i9 polluted. The upland surface water derives its impurities from the catchments area‚ the sources being human habitations and animal keeping
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During the data collection procedure‚ there were potential limitations that could possibly affect the validity of the data collected and the conclusions that could be drawn from my investigation. The method optimisation study was based on trehalose‚ however‚ in an ideal world where no time restraints are present; the reconstitution study could be performed for each of the cryoprotectants to identify the most suitable method for each. This would then take into account the various differences that
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