Acid Base Titration Purpose: The purpose is to calculate the molarity of a NaOH solution by titrating the base with 5mL of standard HCl solution in each trial. By adding the base with unknown molarity to the acid with 0.10M the molarity of NaOH can be calculated. The base‚ NaOH‚ helps bring the pH of the acid‚ HCl‚ closer to seven‚ which neutralizes it. When using the buret the amount of NaOH used is able to be determined. Then by writing a balanced chemical equation and using the titration
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Investigation and Preparation of Esterification Lab Introduction Esters are classified as organic compounds commonly derived from carboxylic acids. They are compounded from the reaction of a carboxylic acid with an alcohol in the presence of a strong acid to be used as a catalyst. The formula that represents an ester is R-COO-R where both Rs’ are alkyl groups‚ one which is bonded to an oxygen‚ and the other to a carbon which is double bonded to 1 oxygen and single bonded to the other. Esters
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Introduction Chemical kinetics is the study of reaction rates. A reaction rate is the speed of the change in either reactants or products over a period of time. General kinetic rate equation is: Where [A] and [B] are the concentration of the species in the reaction. The variable k is the rate constant‚ which is a function of time and catalyst presence. The variables m and n are the order of reaction for their respective species concentration. The higher the value of the reaction order the
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In this lab we are going to be observing the decomposition of piglets over a month’s time. There are theory questions that have been given to us before and after the lab. We look back at our original theory to see where we went wrong‚ and then correct it. The lab was disgusting‚ surprising‚ and very interesting. The first questioned to be answered is which piglet decomposes faster‚ a piglet that is in its natural state‚ that is burnt‚ that is buried‚ and that is buried in a wooden box? With
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Standardization and Improvement of in-vitro Diagnosis and Monitoring of Treatment of Immunodeficiency Diseases in Developing Countries Nabila El-Sheikh; Molecular Immunology Unit‚ Al-Azhar University Ladies and Gentlemen The World Health Organization recognizes more than 200 primary immunodeficiency diseases (PIDD) - some are relatively common‚ others are quite rare; some affect a single cell within the immune system; others may affect one or more components of the system. An accurate
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(Ba(OH)2). Through the conductivity‚ the equivalence point can be determined; from there‚ the concentration of the Ba(OH)2 solution can be found. The final product of the reaction between sulfuric acid and barium hydroxide is insoluble. According to the lab manual‚ during the reaction‚ the total number of dissociated ions in solution is greatly reduced as a precipitate is formed. With the Conductivity Probe‚ the changes in conductivity of the solution will be analyzed. The collection of Ba(OH)2 precipitate
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which forms to NaOH solution. Fold the filter paper and stick inside the funnel‚ and pour the solution of copper (II) hydroxide through the filter. The purpose of this experiment is to determine the yield of copper (II) sulphate reaction. Reagent preparation: 0.5 mol/L = mol/0.1L 0.5 (0.1L)=mol mol = 0.05 0.05 x 40 (molar mass)= 2 There are 2 grams of solid sodium hydroxide. Method: Weigh 100 mL beaker Transfer anhydrous copper (II) sulphate to that beaker Heat
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Abstract: The Enzyme Lab results where when the liver was frozen‚ its reaction was fast‚ and when it was hot‚ it was slow‚ and the liver that was at room temperature reacted slowly to medium. Introduction: The Enzyme Lab is to conduct investigations to determine the most favorable conditions for the most efficient enzyme activity. Variables to be used testing include temperature‚ pH values and surface area. Enzymes are proteins that speed up the rate of chemical reactions‚ which would otherwise
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Abstract: For the first part of this lab we refluxed different Carboxylic acids and alcohols in the presence of a acid catalyst in order to form Esters by Fischer Esterification. These Esters had different pleasant smells that we then evaluated. In the second part of the experiment‚ we broke the ester bonds of a triglyceride in order to form glycerol and carboxylate salts. This process is known as Saponification because it produces amphiphilic molecules that allow soap to remove dirt from the surface
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= 30.02 g Weight II (beaker + 1-bromobutane) = 30.64g Weight of 1-bromobutane = WII - WI = 30.64 - 30.02 = 0.62 g Molar Mass of 1-bromobutane (C4H9Br) = 137.02 g/mol Molar Mass of butyl benzoate (C11H14O2) = 178.23g/mol Mole ratio = 1:1 Limiting agent: 1-bromobutane Density of 1-bromobutane= 1.27g/ml‚ Volume = 2.0ml Mass of 1-bromobutane = 1.27 x 2.0 = 2.54g Theoretical mass of 1-bromobutane = 2.54 /
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