changes to the phenomenon of osmosis. Method: We soaked several discs of potato cuted using a cork borer with around 1 centimeter of diameter and 2 milimeters of lenght into sucrose solutions with a different range of concentrations from 0 to 1.0M. Then we weighed all the potato cylinders on an electronic balance (see results) and recorded the results. We placed enough pieces of potato to cover the bottom of the petri dish and left them for 60 minutes. After this time we
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TOPIC: Food Tests – Semi Quantitative Test AIM: To determine the concentration of glucose present in an unknown sample‚ using a semi quantitative glucose test APPARATUS AND MATERIALS: 4% stock solution of glucose‚ water‚ 6 test tubes‚ ruler‚ water bath‚ solution of unknown concentration (Sample A)‚ Benedict’s reagent METHOD: 1. Solutions of different concentration were made from the stock solution and placed in test tubes.
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08.2013 TITLE: Transport across membrane OBJECTIVES: To investigate the effect of concentration of blackcurrant squash on osmosis in chipped potatoes. INTRODUCTION: In biology‚ osmosis is defined as the diffusion of solvent molecules (usually water molecules) across a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration. Osmosis is of great importance in biological processes where
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purpose of this experiment is what happens when a solid substance‚ a metal carbonate is added slowly to a solution of an acid. We are finding methods of determining acid concentration. For us to balance certain equations‚ we will use a stoichiometry. For this experiment‚ we will need to set up the ratio and finding the concentration of HCI. Procedure: • Grab 4 different beakers. • Add a small amount of sodium carbonate onto a weighted beaker. • For each beaker pour 10 mL‚ 15 mL‚ 20 mL‚ and 30 mL of
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an area of high-level water concentration‚ that is‚ a dilute solution‚ to an area of low-level water concentration‚ that is‚ a strong solution through a semi-permeable membrane. (Passmyexams.co.uk‚ 2015) Actually‚ water moves in a bi-directional manner with the aim of leveling up the concentration. However‚ a high number of water molecules move from the fresh water towards the salty water. The outcome is a net transfer of molecules down the concentration gradient. Finally‚ the water
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of different concentrations. The water passes from a region of high concentration to a region of low concentration‚ until the two concentrations are equal in concentrations of water. Many cell membranes behave as semi permeable membranes‚ and osmosis is a vital mechanism in the transport of fluids in living organisms‚ for example‚ in the transport of water from the soil to the roots in plants. If a cell is in contact with a solution of lower water concentration than its own
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Research Question How does changing the concentration of Zn2+(aq) ions (0.2‚ 0.4‚ 0.6‚ 0.8‚ 1.0) (moldm-3) affect the voltage (V) of the voltaic cell consisting of Zinc and Copper half cells? Aim To see the relationship between increasing the concentration of Zinc ions and the voltage that is obtained from voltaic cell. The concentration of zinc ions can be directly manipulated by changing the concentration of a zinc sulphate aqueous solution‚ and the voltage will be measured using an electronic
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Effects of oligomycin‚ ouabain‚ p-Aminohippurate‚ sodium concentrations and potassium concentrations on active transport of the Malpighian tubules of Acheta domesticus Key Words: Malpighian tubules‚ Acheta domesticus‚ PAH‚ ouabain‚ oligomycin‚ Na+‚ K+ Silvia Kilic 100488712 BIOL 3040U CRN: 70041 Thursday‚ March 5th‚ 2015. Results The Malpighian tubules were incubated in the solutions for 15 minutes before being observed. The transport of CPR into the lumen was highest when there was no addition
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In this experiment‚ we had to demonstrate the process of osmosis using potatoes‚ and to determine the concentration of the cytoplasm of the potato. To demonstrate this‚ we had 6 test tubes and poured in different sucrose solutions of the following concentrations: 0.0M‚ 0.1M‚ 0.2M‚ 0.5M‚ and 1.0M. Once added in with all the sucrose solutions‚ we added in the 6 cylindrical potatoes of equal diameter and length. Before and after putting it in the potatoes‚ we had to weigh the initial and the final mass
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will move from an area of high concentration to low concentration. Also‚ the rate of which it would move depending on concentration. The higher the concentration of sucrose inside of the dialysis bag‚ the faster the rate of water will travel into the bag. The rate of osmosis increases as the concentration of sucrose inside the bag is higher. Correspondingly‚ with bag 5‚ the water inside the dialysis bag would travel once again to a place of lower water concentration‚ the sucrose in the beaker. This
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