TITLE: Determination of Riboflavin by using UV-Vis spectrophotometry. ABSTRACT: The amount of Riboflavin in various brand of children multivitamins was determine by using UV-Vis spectroscopy instrument‚ the series of standard of riboflavin was prepared in order to determine the amount of the riboflavin in the sample of children multivitamins. The maximum amount of riboflavin was found in the Champs multivitamin that contains 0.1155 mg followed by Chewies 0.1131 mg and Scott’s 0.0672 mg. OBJECTIVES:
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This assignment discusses chemical kinetics by determining the rate and average value for rate constant based on experimental values given. The orders of the reactants can only be determined experimentally‚ so we must look at how the concentration of the reactants affect the instantaneous initial rate while holding the concentration of the other reactant constant. In this reaction‚ the overall reaction order for the rate law is third because the order for A is second and the order for B is first
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A hypo-kinetic disease is a disease that is associated with a lack of physical activity or lack of exercising. Obesity is an example of a hypo-kinetic disease‚ which makes sense because it is a condition of an accumulation of excessive body fat as a result of not creating a caloric deficit as well as not being physically active. Obesity affects the body by changing the normal body composition. It affects cardio-respiratory endurance‚ flexibility‚ muscle endurance and how much power and strength one
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Coefficient of Kinetic Friction Objective: After completing this experiment‚ you should be able to measure the coefficient of sliding friction of an object that is located on an inclined plane. Apparatus: Inclined Plane Pulley attachment for plane Wooden blcok‚ with hook attached Meterstick Felt Set of masses String Protractor Procedure: 1. Place the board in the position shown in Figure 7-1. 2. The angle of the board should be small enough so that the wooden block will not slide
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data obtained in the kinetic trace experiment in order to determine the different components that made up the rate law. Using absorbance spectroscopy to monitor concentration over time‚ rate order of the dye was found to be 1st order through the integrated rate law and through the proportionality method; the order of the bleach was also determined to be 1st order. Using this information‚ the rate constant was determined to be 0.408 M-1S-1‚ the units indicating that the reaction was a second order
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called titration. According to Petrucci et al.‚ titration is a reaction carried out by the carefully controlled addition of one solution to another. It has several types like acid-base titrations and redox titrations. This experiment focuses on the latter type‚ the redox titration. A redox titration is based on an oxidation-reduction reaction between analyte and titrant (Harris‚2009). It involves the transfer of electrons between the two solutions. This experiment aims to determine the amount
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Competency Goal VI To maintain a commitment to professionalism Functional Area #13: Professionalism As a professional I attend regular trainings both in and out of work. Some training is provided for me by my employer‚ while others I seek out on my own. In June I attended training for 2 weeks before children started attending class. These trainings focused on areas such as health‚ routines and transitions‚ environments‚ goals/objectives and school readiness. One way I apply these trainings
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(PNPP) substrate concentration changes. We will empirically determine the concentration of production formation‚ Vmax and Km from absorbance of yellow PNP in the reaction. Results Figure 1 This figure indicates a positive linear trend for the concentration of PNP and absorbance. Table 1: Absorbance Value for Acid Phosphatase Reaction at Varying Concentrations of PNPP with the Final Product Concentration Time(s) 5mM(PNPP) Product (PNP)1 Product(PNP)1μM 2.5mM PNPP Product (PNP)2 Product(PNP)2μM
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precipitation reaction is‚ describe ways which one can predict whether a precipitation reaction would form or not‚ describe the uses of precipitation reactions in everyday activities and industries BACKGROUND INFORMATION: Precipitation is the formation of a solid in a solution during a chemical reaction‚ such as evaporation. A substance that causes precipitation when it is added to a solution is called a precipitant. This can occur when an insoluble substance is formed in the solution due to a reaction or
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In this essay‚ it will be discussed how the Kinetic Molecular Theory explains many gas law specifically Boyle’s gas law‚ Charles’ gas law‚ and Avogadro’s gas law. To understand what will be talked about is to first know what the Kinetic Molecular Theory is. In our textbook is says it is “A simple model for gases that predicts the behavior of most gases under many conditions.” First off‚ we will take a look at Boyle’s Law. As stated in our lab manual “at constant temperature the pressure which a given
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