and 10: Volumetric/Vinegar Analysis Abstract: The goal of the experiment that was conducted was to figure out both the molar concentration of NaOH and the standard mole ratio of the NaOH solution. In order to find the concentration of the NaOH solution‚ volumetric analysis was used. In volumetric analysis‚ a titration mechanism was utilized in order to find the reaction that the base will end up having with KHC8H4O4.‚ also known
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recorded at the potential of 0.73 V vs. Ag|AgCl in the concentration ranges from 16 μM to 4.0 mM. It can be seen that the aerometric current increases clearly after each injection of OA. Fabricated sensor displays the rapid response towards change in the concentration of OA which reaches a steady state within 2 s by applying the potential of 0.73 V to Ag/ZSM-5/CPE. A calibration plot of the amperometric current response versus oxalic acid concentration is displayed in Fig. 7B. Fig. 7 Results show that
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work out the isotonic point of the potato cell sap. Prediction I have looked at my scientific knowledge from the background theory I carried out and I will base my prediction upon this information. In this experiment‚ I expect the different concentrations to show fairly noticeable effects on the lengths and masses of the potatoes‚ with the water diffusing into the potatoes at a high rate in the sucrose solution and therefore making their size bigger than at the start. As the distilled water solutions
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There are a pair of kidneys that are 1% of the weight or account for 25% of cardiac output. They spend a large amount of blood and they represent a 20 to 25% of cardiac output they control the concentration of most of the constituents of the body fluids and excrete the end products of metabolism. All living things‚ whether aquatic or terrestrial‚ are required to osmoregulation or osmotic pressure regulation. Many of them have managed to survive at
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environment have equal concentrations of solutes. Therefore cells in an isotonic solution do not experience osmosis. When the cell is hypotonic it has a lower concentration of solutes so water will move out of the cell. When the cell is hypertonic‚ it will have a higher concentration of solutes and water will move into the cell to attempt to reach an isotonic state. The primary purpose of this exercise is to measure the rate and direction of osmosis under different concentrations. The greater the
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level off‚ the results were recorded as the freezing point of pure water. The value was recorded in a lab notebook. For part 2 of the experiment‚ the van’t Hoff Factor of sodium nitrate was determined. 25mL of sodium nitrate was obtained and the concentration information recorded. A large test tube was filled 1/3 full of the solution and placed into the ice bath. The probe was placed in the test tube and the “collect” button pressed. The solution was stirred and once the temperature leveled off‚ the
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the passage of materials into and out of the cell. Cell membranes are ‘semi-permeable’ which means that some substances can easily pass through them‚ whereas others cannot. Materials move by simple diffusion from high concentration on one side of the membrane to a lower concentration on the other side. Water is the most abundant and one of the most important substances in cells. The diffusion of water across a membrane is called osmosis. Water will diffuse
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Table Nr 1. Color changes in IKI test for presence of starch and for presence of sugar in Benedict’s test |Part 1 |Original content |Original color |Final color |Color after Benedict’s test | |Sausage casing |glucose and starch |clear |clear | | |Beaker |distiled water |transparent |transparent
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experiment we explore the infestation of ECB (European Corn Borer) on different types of corn and how it effects the corn crop yield. The corn is grown in a controlled environment with the only changing variables being the type of corn and the concentrations of the infestation of the ECB. Varying levels of infestation are tested on a corn crop throughout a 140 day growing season‚ at the end of the season the crops are then measured for yield. Yield is determined by the number of ears per stalk and
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increasing concentration of sucrose in solution. The results seen in the water control as well as possibly the 0.2M sucrose occur because the water potential outside of the potatoes would be higher thus encouraging water to move into the potatoes and increase their mass. In other words‚ osmosis (diffusion of water from high to low concentration across a membrane) occurred and moved water from the environment hypotonic to the carrot into the carrot itself in an attempt to equalize concentration between
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