system to be in the state of dynamic equilibrium. (4 points) Dynamic equilibriumis a state of balance where the forward and the reverse reactions occur at the same time and the rates are the same. The reverse reaction and forward reaction are kept constant with time. Only closed systems have equilibriums. 2. Describe what you observed in each part of this lab. Do you think that each part of this activity helped to illustrate the concepts of equilibrium? Explain your answer completely in paragraph
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Spectrophotometric determination of the equilibrium constant of a reaction K.F.P. Boado Department of Chemical Engineering‚ College of Engineering University of the Philippines‚ Diliman‚ Quezon City‚ Philippines 4 March 2015 Jade Nazareno ABSTRACT The experiment aims to determine the Keq of the formation of Fe(SCN)2+ through the use of UV-Vis spectrophotometry. The solutions used in the study were allowed to equilibrate days before calibration in a UV-Vis spectrophotometer which determined the absorbance
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first order DEs . . . . . . . . . . . . . 1.2.2 Solving separable DEs . . . . . . . . . . . . . . 1.2.3 Solving linear DEs . . . . . . . . . . . . . . . . 1.2.4 Qualitative sketches of families of solutions . . . 1.2.5 First order linear DEs with constant coefficient 1.2.6 An important special case . . . . . . . . . . . . 1.2.7 A common error . . . . . . . . . . . . . . . . . 1.2.8 Initial value problems . . . . . . . . . . . . . . . 1.3 Other applications of first order DEs . . . . . . . . . .
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change in chemical equation with a new equilibrium constant. An overall reaction is the sum of two or more reaction steps with different equilibrium constants. The overall equilibrium constant‚ Koverall‚ is the product of the equilibrium constants of the individual reaction step. If a reaction step is reversed‚ the equilibrium constant is set into its reciprocal. If a reaction step is multiplied by a common coefficient n‚ the new equilibrium constant is raised to the nth. The first part of the experiment
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react with thiocyanate ions (SCN-) to form iron (III) thiocyanate‚ FeSCN2+. It is represented in the equation below: Fe3+ (aq) + SCN- (aq) FeSCN2+ (aq) Therefor the equilibrium constant for this reaction is: KC = [FeSCN2+]/([Fe3+]•[SCN-] For this experiment we were able to determine the equilibrium constant KC for this reaction. First we prepared five different mixtures with known initial concentrations of iron (III) and thiocyanate ion. By using the colorimeter we determined the absorbance
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G. F. Chemistry for Environmental Engineering‚ 5th ed.‚ McGraw Hill‚ 2003. Theory The dissolution and evolution of dissolved oxygen (DO) in the air-water system can be represented by the equation: [pic] (1) which has the equilibrium constant: [pic] (2) where aO2(aq) is the activity of oxygen in the water and fO2(g) is the fugacity‚ or activity‚ of oxygen in the gas phase. When the fugacity of oxygen is approximated by its partial pressure (PO2) and the activity of
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Quintessence Another genre of model for dark energy are the scalar-field models. Unlike the cosmological constant‚ the scalar-field models are dynamic. They hold that the force causing the accelerating expansion of the universe varies based on time and locations. Moreover‚ as the name suggests‚ scalar fields are used to demonstrate the magnitude at the specified point in space and time. In essence‚ they demonstrate that the fabric of space-time is not homogeneous. Consequently‚ a non-homogeneous
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Experiment 13 Charging and Discharging Capacitors 1. Introduction In this experiment you will measure the rates at which capacitors in series with resistors can be charged and discharged. The time constant RC will be found. Charging a capacitor. Consider the series circuit shown in Fig. 1. Let us assume that the capacitor is initially uncharged. When the switch S is open there is of course no current. If the switch is closed at t=0‚ charges begin to flow and an ammeter will be able
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There is a popular story that Newton was sitting under an apple tree‚ an apple fell on his head‚ and he suddenly thought of the Universal Law of Gravitation. As in all such legends‚ this is almost certainly not true in its details‚ but the story contains elements of what actually happened. What Really Happened with the Apple? Probably the more correct version of the story is that Newton‚ upon observing an apple fall from a tree‚ began to think along the following lines: The apple is accelerated
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changes will cause an increase in the equilibrium concentration of CO?Answer increasing the pressure of the system at constant temperature | adding more O2 to the system | removing CO2 from the system | increasing the temperature of the system | adding a catalyst | 4 points Question 5 Which of the following correctly describes the equilibrium constant for the gas-phase reaction between H2 and O2 to form gaseous H2O?Answer Kc = | View Full Image | |
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