Determination of KHP – Acid - Base Titration For determining purity of unknown KHP‚ acid – base titration was used. Molarity of titrant in this case NaOH was standardized as 0.04958(±0.00011) M. Purity of unknown KHP was calculated as 35.88(±0.16) %. • Introduction Acid – base titration is typical method of determining unknown figures. Acid – base titration means that by using neutralization between acid and base. Abrupt changing of pH says whether procedure is done or not. pH indicators
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Experiment #2 “Density Determinations” Report The objective for experiment #2 was “to determine densities of objects/salt solutions with different concentrations of salt‚ to see how density changes as a function of concentration.” In experiment #2‚ part II‚ calculations of Density of NaCL solutions were made from 0%-25% NaCL concentration. My hypothesis was that as the % increased‚ so would the density‚ because adding weight would increase the density of each solution. The density calculations
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determined by analyzing the amount of iodine (I2) formed. Two chemical reactions are useful to determining the amount of iodine is produced. I2(aq) + 2S2O32-(aq) 2I-(aq)+S4O62-(aq) (3) I2(aq) + starch I2 *starch(blue complex) (4) Reaction (4) is an iodine-starch reaction‚ used solely to determine when the production of iodine is occurring by turning a clear colorless solution to a blue color. Without reaction (4) it would be very difficult to determine how much iodine is being produced‚ due to how
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literature value for the effects of temperature on the rate of the Iodine Clock Reaction‚ there was no final percentage error. However‚ Looking at Graph 1.6‚ the line of best fits clearly shows the low precision throughout this experiment resulting in an increase of Random error. This could be due to the many assumptions being made in this experiment. We are assuming that there was no cross contamination between Solution A‚ B and water. Though it is highly likely that someone used the same pipette or
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Experiment A1: Kinetics of the Reaction between Acetone and Iodine The key aim of this experiment was to determine the rate equation for the acid-catalysed iodination of acetone and to hence consider the insinuations of the mechanism of the rate equation obtained. The stoichiometric equation for the reaction between iodine and acetone is below‚ followed by the rate equation (where x‚y‚z and k are the values to be obtained): I2 + CH3COCH3 CH3COCH2I + HI -d[I2]/dt = k [I2]x [CH3COCH3]y [H+]z
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Lab #2 Determination of Density Britney Williams Chemistry 121 Dr. Yu 1/29/13 Purpose: To determine the densities of aluminum and zinc cylinders Density is the relationship between the mass of an object and its volume. Sometimes density can be easy to sense. If two objects have exactly the same shape and size‚ the denser one may feel heavier. If their densities are close together‚ it can be hard to tell the difference. It gets really tough if you are dealing with materials that have very different
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CHEM 1105 Experiment 4: Determination of a Chemical Formula Introduction When atoms of one element combine with those of another‚ the combining ratio is typically an integer or a simple fraction. The simplest formula of a compound expresses that atom ratio. When two or more elements are present in a compound‚ the formula still indicates the atom ratio. To find the formula of a compound we need to find the mass of each of the elements in a weighed sample of that compound. For example‚
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Determination of Chemical Formulae: The Reaction of Zinc and Iodine By Sarah Abstract: The main objective of this experiment was to use to the reaction between zinc and iodine to examine the validity of the Law of Conservation of Mass and the Law of Constant Composition. The Law of Constant Composition was tested by determining the mass of each of the reactants‚ zinc and iodine‚ and comparing their total to the mass of the zinc iodide product plus the excess zinc. The total mass of the reactants
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Determination of Vitamin C (Ascorbic acid) concentration in some of Commercial Products‚ by Redox Titration Mouhannad AL.-Hachamii Sadiq J. Baqir Saadon A.Aowda Fatima A. Hussein‚ Dep.of chemistry‚ college of science‚ Babylon University Muhammed K.Alasedi Ministry of Health Hilla city‚ Babylon Abstract The goal of this search is to determine the concentration of vitamin C (Ascorbic acid ) in some of a Commercial Products‚ Vegetables and Fruit Juices by Redox Titration. A redox
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Since I was young‚ I have striven to achieve my goals; I call it a "determination to succeed." Without a "determination to succeed‚" giving up in life‚ when a situation seems impossible to overcome‚ becomes second nature. The methods one uses to overcome the challenges faced in life affects how one acquires success. For example‚ my ancestors did not overcome their struggle for equality without self-determination to better their lives. Thus‚ their lives have been an inspiration for me. The motivation
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