Essays on Equilibrium constant

The preliminary experiment
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This will help ensure that the results of the experiment are reliable and ensure that the acids react with the magnesium and not the formulated oxide layer. The Acids: Choice of acids and their varying strengths was based upon the Bronston-Lowry theory. According to the Nuffield Advanced Chemistry Students' Book, acids that ionise completely at moderate dilutions are called strong acids. Consequently they tend to have a large Ka (dissociation constant) value. Weak acids interact very little with water therefore…...
ChemistryEquilibrium constantExperimentHydrogenMaterialsPhysics
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Submission Date: March 1, 2019Section (please circle): M T W Th FRoom (please circle): 204 206Spectrophotometric Determination of The Equilibrium Constant for the Reaction Between Iron (III) and ThiocyanateToni-Ann Brown (100149242), Zhongqi Xiang AbstractTo find the equilibrium constant for the reaction between iron (III) and thiocyanate, absorbances of different equilibrium systems of FeSCN2+(aq) were measured by a spectrophotometer set at wavelength 470 nm. These absorbances were used to calculate the concentration of FeSCN2+(aq) at equilibrium, using Beer's Law, after which…...
Equilibrium constant
Determining an Equilibrium constant
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To find out the equilibrium constant, Kc, for the reaction below, using acid hydrolysis: CH3COOC2H5 + H2O? CH3COOH + C2H5OH Theory although the hydolysis of ethyl ethanoate is very slow, by using dilute hydrochloric acid as catalyst which can be used to alter the time required to reach the equilibrium as the catalyst increases both the forward and backward reaction to the same extent,the above equilibrium can be attained in 48 hours. After 48 hours, the reaction mixture can then…...
Equilibrium constant
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Determination of the equilibrium constant for esterification
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Esterification is the reaction of a carboxylic acid with an alcohol. This experiment is an esterification response between ethanoic acid and propan-1-ol when warmed: CH3COOH(aq) + CH3CH2CH2OH(aq) < CH3COOCH2CH2CH3(aq) + H2O(l) The development of propyl ethanoate is especially well-suited to the decision of the stability constant. The reaction is sluggish enough at room temperature level so the order of mixing, temperature level variations over the reaction time and even a last titration with a strong base just have little effect…...
Equilibrium constantTitration
Determination of Heat of Solution
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ABSTRACT Thermodynamic values can be determined using the Vant Hoff isochore method. This method entails the use of equilibrium systems to determine the change in enthalpy of the solution, which can b related to the change in internal energy of the solution. The van't Hoff isochore relates the equilibrium constant of a chemical reaction at one temperature to the equilibrium constant of the same reaction at a different temperature, allowing it to be worked out for all temperatures if it…...
Equilibrium constantHeat
The Contact Process
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The Contact Process is the name given for the manufacture of Sulphuric Acid (H2SO4(l)). There must also be specific conditions of temperature, pressure and catalyst for the reaction to occur effectively. I will also look at the effect of temperature, pressure and catalyst on the composition of the equilibrium mixture, with respect to Le Châtelier's principle. THE PROCESS Firstly, Sulphur Dioxide (SO2(g)) is manufactured by burning Sulphur (S(s)) in air. The sulphur dioxide is then purified. S(s) + O2(g) →SO2(g)…...
ChemistryEquilibrium constant
Studying the pH of Strong Acid
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The purpose of the current experiment was to determine the pH of various hydrochloric acid and acetic acid solutions, to determine the pH of various salt solutions, to prepare a buffer solution, and determine the effects of adding a strong acid and strong base to the buffer solution versus adding a strong acid and strong base to water. The measured pHs for the hydrochloric acid solutions were 1.6, 2.2, 2.9, and 3.8. The measured pHs for the acetic acid solutions…...
Equilibrium constantStudying
Determining of the equilibrium constant for the formation of FeSCN2+
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Pages • 2
Determining of the equilibrium constant for the formation of FeSCN2+ Introduction The objective of this experiment was to determine the equilibrium concentration and then determine Kc. A dilution calculation was formed to determine the concentration of SCN- and Fe(SCN)2+. Each cuvette was filled to the same volume and can be seen in table 1. Then the absorbances were recorded from each cuvette and can be seen in table A Beer’s law plot was made from the data that was recorded…...
Equilibrium constant
Identification of an Unknown Organic Acid
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Abstract Identifying this organic acid was an extensive task that involved several different experiments. Firstly, the melting point had to be determined. Since melting point can be determined to an almost exact degree, finding a close melting point of the specific unknown can accurately point to the identification of the acid. In this case the best melting point range was 207-209 degrees Celsius. Melting point, while very helpful in identifying an unknown organic acid, is simply not enough. Next, a…...
Calcium carbonateChemistryChromatographyEducation System TodayEquilibrium constantExperiment
The simple distillation method Lab
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The purpose of this lab was for students to familiarize and perfect the simple distillation method to produce 4-Methylcyclohexene and to gain experience using an IR spectroscopy to characterize the product of the reaction in favor of equilibrium. B.Results and Discussion: C.Experimental: 24 mL of 4-methylcyclohexanol, 5mL of phosphoric acid, and 1mL of concentrated sulfuric acid was added to a 250 mL round bottom flask and mixed thoroughly with a magnetic stirrer. A simple distillation set up was installed with…...
ChemistryEquilibrium constant
Oxalate ION
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The dissociation of protons from oxalic acid proceeds in a stepwise manner as for other polyprotic acids. Loss of a single proton results in the monovalent hydrogenoxalate anion HC2O4−. A salt with this anion is sometimes called an acid oxalate, monobasic oxalate, or hydrogen oxalate. The equilibrium constant (Ka) for loss of the first proton is 5.37×10−2 (pKa = 1.27). The loss of the second proton, which yields the oxalate ion has an equilibrium constant of 5.25×10−5 (pKa = 4.28).…...
Equilibrium constant
Simultaneous Determination of Several Thermodynamic Quantities
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I. INTRODUCTION The solubility product constant, Ksp​, is the equilibrium constant for a solid substance dissolving in an aqueous solution. It represents the level at which a solute dissolves in solution. A more a substance dissolves, the higher the Ksp value it has. In this experiment, a system of a sparingly soluble salt in water is studied. From the solubility information at various temperatures, the changes in standard enthalpy, standard entropy, and standard free energy were established. II. THEORETICAL BACKGROUND…...
ChemistryEquilibrium constantScience
Melting Point Determination
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Identifying an unknown compound can be a difficult task. In identifying a compound, researchers often measure several physical properties: melting point, boiling point, density and observes a few chemical properties: reactivity, acidity, basicity of the compound. The reason for determining several chemical and physical properties of the compound is that it is quite possible for two different compounds to have a few physical and or chemical properties in common; but it is highly unlikely for the two compounds to have…...
ChemistryEquilibrium constantResearchScience
Apple Research Project
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To help Apple figure out what can be done to maintain and/or surpass its current level of success within the smartphone market Team D created and administered a ten question survey. The purpose of the survey is to gain knowledge on what consumers think about the iPhone and determine any desired changes to ensure Apple’s top rating within the smartphone market. The results of the survey will be analyzed to identify any trends or similarities between all of the different…...
Apple IncDataData AnalysisEquilibrium constantIphoneResearch
Evaluation of a Gas Constant (Experiment)
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Paper Type:Evaluation essays
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)…...
Equilibrium constantExperimentPhysics
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