LAB FACILITATOR : REPORT DUE DATE : 4 OCTOBER 2013 INTRODUCTION The laboratory method used in the experiment 1 is titration. The technique of titration finds many applications‚ but is especially useful in the analysis of acidic and basic substances. Titration involves measuring the exact volume of a solution of known concentration that is required to react with a measured volume of a solution of unknown concentration‚ or with a weighed sample of unknown solid. A solution of accurately
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Common Introduction: -Beer-Lambert Law found by Beer August and Johann Heinrich Lambert is the linear relationship between the attenuation of light and concentration of the material through which the light is travelling. It states the absorbance is proportional to the concentration when a parallel beam of monochromatic radiation of equal pathlength is passing through a homogenous concentration. A=εbc‚ where A is absorbance‚ ε is molar absorptivity (L molˉ1cmˉ1)‚ b is the pathlength (1cm) and c
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solution. In titration ‚ permanganate solution is put in the burette and is run down to an acidified solution of reducing agent‚ e.g..ammonium iron(II) sulphate solution.In this experiment‚ KMnO4 will be used to determine the percentage of Fe2+ in an unknown solid sample dissolved in water. The permanganate oxidation of Fe2+ to Fe3+ is carried out in an acidic solution to prevent the air oxidation of Fe2+.A potassium permanganate solution will be standardized by titrating it with a
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A titration is a method where a solution of known concentration is used to determine the concentration of an unknown solution. Typically‚ the known solution is added from a burette to a known amount of the unknown solution until the reaction is complete. Knowing the volume of the known solution added allows the determination of the concentration of the unknown. Often‚ an indicator is used to usually signal the end of the reaction‚ the endpoint. Concentration is the abundance of a constituent divided
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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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1. To determine the wavelength of maximum absorption‚ Amax of bromophenol blue. 2. To construct a standard concentration curve for bromophenol blue. 3. To determine the concentration of the unknown bromophenol blue solutions. 4. To determine the concentration of two different solutes‚ bromophenol blue and methyl orange‚ in a mixture. Material and method: Refer to practical manual page 7 Results: Part 1: Determination
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Introduction The introduction is certainly the most read section of any deliverable‚ and it largely determines the attitude of the reader/reviewer will have toward the work. Therefore‚ it is probably the most delicate part of the writing of a report. Unfortunately‚ many people (even very experienced ones) seem to have difficulties at writing a good introduction. For some‚ it is a daunting task. In this short article‚ I present a very simple method for writing a good introductory chapter. Actually
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Nicolas Morales Principles of Management Professor Ehiobuche May 10th‚ 2014 Adidas‚ a Company which targets the sport market and customers of the Urban upper-middle and upper class who have young men ‚women and children who have passion for fitness and sports. Adidas is worth over 8.3 Billion dollars. Herbert Hainer‚ the CEO of Adidas makes a large chunk of that money‚ along with the many endorsement deals with famous celebrities. Many other people that profit from Adidas are the stockholders
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Viviana Veber Bio 1510 Sec 21 Carbohydrates Introduction: The objective of this experiment was to identify the reaction of carbohydrates in Benedict’s test‚ Barfoed’s test and Iodine test. Carbohydrates are essential to living organisms‚ and the principal role of carbohydrates is the production of energy. Carbohydrates are groups of sugars that contain carbon‚ oxygen‚ and hydrogen in a 1:2:1 ratio. Three main units of carbohydrates are monosaccharides‚ disaccharides‚ and polysaccharides
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Incident Reports‚ Logs‚ and Narrative Reports Differences Introduction The use of incidents reports‚ logs and narrative-only reports is commonplace in a number of public and private sectors‚ including law enforcement and health care where they are used to codify different types of events for different purposes. Irrespective of the setting and purpose‚ though‚ these types of written records can play a vital role in keeping track of important events and establishing accountability
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