Spectrophotometric Determination of an Equilibrium Constant Introduction: In this experiment‚ you will study the reaction between aqueous iron (III) nitrate‚ Fe(NO3)3‚ and potassium thiocyanate‚ KSCN. They react to produce the blood-red complex [Fe(SCN)]2+. Fe3+ + SCN- ( [Fe(SCN)]2+ The equilibrium constant expression may be expressed as: K = [pic] You will prepare a series of standard solutions that contain known concentrations of [Fe(SCN)]2+ and will determine
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Determination of an Equilibrium Constant. Abstract: The report presents determination of equilibrium constant for the formation of a complex ion FeSCN2+. This was accomplished using a colorimeter to measure absorbance of some known concentration solutions in order to generate the calibration curve. The equation of the graph was used to compute the equilibrium concentrations of the reactants and products‚ needed to calculate the equilibrium constant for the reaction. I. Introduction:
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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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English Constant Gardner Directed by Fernando The Film ‘The Constant Gardener’ Directed by Fernando Meircelles‚ Is fill confusion‚ entertainment and love. I thought the film was very good in the techniques the director used‚ but was hard to get my head around. ‘The Constant Gardner’ would be thought to be about gardening‚ but it’s just based around it. The concept of gardening is the story line of the movie. Two main characters Tessa and Justin are in love‚ but don’t know each other as well
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Fernando Meirelles’ “The Constant Gardener” is a complex thriller/love story‚ based on the novel of John le Carre‚ containing a heavy use of non-linear story weaving‚ flashbacks and flash forwards. The main character‚ Justin Quale‚ is shown as an unassuming‚ almost passive person‚ while his wife‚ Tessa‚ is shown as assertive‚ and almost aggressive. Justin and Tessa are important to the film‚ because the contrast between their characters helps develop the theme of the never-ending work of gardening
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Stephanie Ralston Film Aesthetics and Analysis In the film‚ The Constant Gardener (Meirelles‚ 2005)‚ the use of editing helps to convey a central theme of uncertainty. Another important theme that arises in the film is justice. Uncertainty progresses into a revealing of truth that leads the protagonist to seek justice. The plot follows a young woman‚ Tessa (Rachel Weisz)‚ whose murder provokes her husband‚ Justin (Ralph Fiennes)‚ to explore the corruption of the drug company Tessa was trying
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Determination of Equilibrium Constants Introduction Bromothymol blue is an indicator for many acid-base titrations. When adding different solutions within the indicator it is to react and change colors‚ in this experiment the different colors were blue‚ green‚ and yellow. In the following experiment‚ obtaining the absorbance levels for each one makes it possible to calculate the equilibrium constant. Materials and Methods For this specific experiment there are a few materials that are crucial
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EXPERIMENT 2 ACID DISSOCIATION CONSTANT OF AN INDICATOR DYE OBJECTIVES Using spectrophotometric method: determine the wavelengths at which the acid and base forms of the dye in aqueous medium exhibit maximum absorption; determine the molar absorptivities of the acid and base forms of the dye and estimate an unknown concentration of the dye in solution using the Beer-Lambert’s Law; and determine the acid dissociation constant of the indicator dye. THEORY The absorption or reflection of
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DATE PERFORMED: JULY 20‚ 2007 SPECTROPHOTOMETRIC DETERMINATION OF EQUILIBRIUM CONSTANT FOR A REACTION ABSTRACT UV-VIS spectrophotometry is one of the most widely-used methods for determining and identifying many inorganic species. During this experiment‚ this spectrophotometry was used to determine the equilibrium constant‚ Keq‚ of the Fe3+(aq)+SCN-(aq)↔ FeSCN2+(aq) reaction. By determining the amount of light absorbed‚ the concentration of the colored FeSCN2+ solution was also quantitatively
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Experiment 3: Evaluation of Gas Constant Purpose: The purpose of this lab is to demonstrate the ideal gas law under ordinary conditions. In this lab‚ the variables in the ideal gas law are known or can be found aside from the constant R. Thus‚ the R values can be found and relatively determine the relevancy of the ideal gas law to the lab conditions. The ideal gas law was tested using the reaction: Mg (s) + 2HCl2 (aq) H2 (g) Procedure: 1. Ribbons of magnesium (5) were cut to the approximate
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