of barium and calcium chloride‚ then the highest concentration of calcium chloride would affect them the most because of the production of hydrochloric acid and calcium oxide from the mixing of water and calcium chloride‚ two very dangerous acids‚ with the highest concentration having the biggest chemical reaction. Within five minutes of putting the Daphnia into the 10 (ppt) solution of calcium chloride‚ one or more of the Daphnia died. The Daphnia in the 1 (ppt) solution of calcium chloride died
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Intracellular free calcium levels: Intracellular free calcium levels were estimated according to the method of Luo and Shi (Luo and Shi‚ 2005). Briefly‚ hippocampi were isolated from mice brains and subjected to hippocampal cells isolation as described later. The cells obtained were incubated with Fura-2 AM at 37°C with gentle shaking. The fura-2 loaded suspension was centrifuged for 10 minutes‚ pellet was washed once with Ca2+-free buffer and was centrifuged again. Aliquots of the washed suspension
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------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- EXPERIMENT NO. 4 ------------------------------------------------- COLORIMETRIC DETERMINATION OF pH ------------------------------------------------- Abstract This experiment examined the result of the various color indicators combined with different buffer solution‚ thereby testing the precision and accuracy of determining the pH value
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Equilibrium: Finding equilibrium constant‚ Kc 1 Abstract Chemical reactions are accompanied with formation of products. A reaction can be reversible or forward according to the rate of formation of product. However‚ they do not reach completion and the mixture remains in equilibrium. This theory help us the study the existence of equilibrium constant‚ Kc. This constant is temperature dependent‚ and it must be calculated at given temperature. This equilibrium constant is used to improve the
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HOW DOES THE SOLUBILITY OF POTASSIUM CHLORIDE (KCL) AND POTASSIUM IODIDE (KI) IN WATER VARY WITH TEMPERATURE? AIM To observe solubilities of KCl and KI with water at different temperatures To compare the two solubility curves and discuss what might vary the solubility of different ionic compounds. THE VARIABLES DEPENDENT VARIABLE Temperature INDEPENDENT VARIABLE Amount of solute (KCl‚ KI) CONSTANTS Amount of the solvent (water)‚ pressure APPARATUS 100G OF POTASSIUM CHLORIDE 100G
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Visayas State University Name: Almera P. Padolina Course & Year: BS Chem 2 Date Performed: July 24‚ 2012 Date Submitted: August 6‚ 2012 Experiment No. 4 Solubility Equilibrium- Common Ion Effect INTRODUCTION: The common ion effect is another example of Le Châtelier ’s Principle in action.The common ion effect tells us that the solubility of an ionic compound is decreased by the addition to the solution of another ionic
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Preliminary Test and Solubility Classification of Organic Compound Keene Louise Topacio‚ Christopher Jay Robidillo Abstract The experiment focuses on how to classify organic compounds by its functional groups. It is done by preliminary test and with the solubility test. Preliminary test used two known compounds also the unknowns. Physical state‚ color‚ odor‚ and ignition test were noted. The known compounds are inorganic and organic compounds. A comparison is made from the observation in the unknown
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CHEMISTRY DETERMINATION OF ENTHALPY CHANGE OF NEUTRALIZATION IA Criteria Assessed: DCP CE MS Introduction When an alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH- (aq)) from alkali‚ forming water. The identity of salt will depend on the nature of the acid and alkali used. H+(aq) + OH- (aq) → H2O(L) The combination of H+ and OH- ions in this way releases energy. In this practical‚ the
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soil property. These two tests are the falling head permeability test and the constant head permeability test. Which test is used depends upon the type of soil to be tested. For soils of high permeability (sands and gravels) a constant head test is used. For soils of intermediate to low permeability‚ a falling head test is used. As we were testing sand we used a constant head permeability test. By carrying out the constant head permeability test we can determine the coefficients of permeability of
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| | | |Chem201L | | Determination of an Unknown Compound using Mixed Melting Point Method Winnie Adrian Ibanez‚ Jerome Allan Japitana‚ and Dante Jimenez III Group no. 7‚ 2Chem a Department of Chemistry‚ College of Science‚ University of Santo Tomas‚ España‚ Manila‚ 1015
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