Title Membrane Permeability Aim To determine the effect of various chemicals and high temperature on the membrane permeability of beetroot Hypothesis Organic solvent and high temperature will destroy the cell membrane and make it permeable to the red pigment. The higher the concentration of the alcohol‚ the greater will be this effect. Principle Beetroot is the material used in this experiment to demonstrate the effects of high temperature and chemicals on the permeability of the cell membranes
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ANALYSIS OF GROUP III CATIONS Precipitation of Group III Cations and Separation into Subgroups Analysis of Subgroup A of Group III Cations Analysis of Subgroup B of Group III Cations (PART 1) Analysis of Subgroup B of Group III Cations (PART 2) ----------------------- Use decantate from group II cations Precipitate Decantate Consider as Group IIIB. Consider as Group IIIA. Centrifuge and separate. Add 10 drops of 1M HCl. Wash with few drops of H2O. Precipitate
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Colligative Properties 202-NYB-05 (Group 06.) By: Jordan Hribar 1034044 Partner: Anthony Cuillierier Teacher: Daniel Baril Experiment Done: February 23rd‚ 2011 Experiment Number 2. Introduction Some of the properties unique to solutions depend only on the number of dissolved particles and not their identity. Such properties are called colligative properties. The colligative property that will be examined in this experiment will be the freezing point depression as an example
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Quantitative Determination of Gravimetric Analysis Ophelia Low Gek Suan 1311907DBT/FT/1A/01 | SYNOPSIS By gravimetric analysis‚ we are able to determine the amount of sulphate in barium sulphate quantitatively. We can do so by slowly adding dilute barium sulphate to an unknown sulphate solution that has been heated and acidified with concentrated hydrochloric acid slightly. A white precipitate will be yield from filtering the solution
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MATERIAL AND METHODS Stability of cell membrane using pH For the lab experiment for testing the stability of beet cell membranes using pH‚ many materials were used as follows. Obtaining a beet we punch out cores‚ using a cork borer. After washing the cores we put each one inside a separate test tube‚ and added a different pH solution in each one. After 3 minutes in these exposure solutions‚ we took the beet out with a dissecting needle. Then transferred each beet to a separate test tube containing
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The Effect of Solvent Exposure and Temperature on Beet Cell Membrane Integrity Introduction: • Cell membranes are vital to proper cellular function • Cell membranes consist of a lipid bilayer made up of phospholipids • Phospholipids are amphipathic molecules meaning they have a dual nature in that they show both hydrophilic (water-loving) and hydrophobic (water-fearing) properties • The amphipathic nature of phospholipids causes them to spontaneously form bilayers in water
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1) How many hydrogen atoms are represented in the formula (CH3)2CH2? 1) _______ A) 8 B) 6 C) 9 D) 5 2) Which has the highest percent mass of Cl? 2) _______ A) C2Cl6 B) CCl4 C) C2Cl4 D) C2Cl2 3) The correct formula for Sodium Nitride is: 3) _______ A) Na3N B) NaNO2 C) NaNO3 D) Na2NO3 4) How many moles of NO3 are there in 6.2g? 4) _______ A) 0.05 B) 10 C) 0.10 D) 384 5) Consider the following equation: 4NH4 + 5O2 → 4 NO + 6H2O How many moles of water
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Broca’s Brain. Sagan‚ Carl. Ballantine Books; Reissue edition February 12‚ 1986. http://antoine.frostburg.edu/chem/senese/101/consumer/faq/harispray-ingredients.shtml http://www.dit.ie/DIT/science/chemistry/rsccomp/competition01/hawkesclancy/bedroom/hairspray.html http://householdproducts.nlm.nih.gov/cgibin/household/ brands?tbl=brands&id=16003315 http://www.madsci.org/posts/archives/feb98/884957935.Ch.r.html http://www.psrc.usm.edu/macrog/ http://www.pg.com/science/haircare/hair_twh_111/hair_twh_111_02
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Abstract: When ionic compounds are dissolved in water‚ they break apart into ions. In this lab the opportunity to mix two ionic solutions and observe the results was given. Some ions will remain dissolved and uncombined in the solution even when they are mixed with other ions. When other ions are mixed‚ they form compounds that appear as cloudy or grainy precipitates. The objective of this lab was to observe the formation of compounds and to write the names and formulas of ionic compounds. It is
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Determining the Limiting Reactant and Percent Yield in a Precipitate Reaction (SMG 6D) AP Chemistry One example of a double replacement (metathesis) reaction is the mixing of two solutions resulting in the formation of a precipitate. In solution chemistry‚ the term precipitate is used to describe a solid that forms when a positive ion (cation) and a negative ion (anion) are strongly attracted to one another. In this experiment‚ a precipitation reaction will be studied. Stoichiometry
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