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11 Nov 2019
question d and 2 and part E 1 and 2
LAB ACTIVITY Integrated Rate Laws 8.2 Objectives Ar the completion of this lob octivity, you wil be oble to 1 Explain time dependence of reactant concentration Perform a serial dilution and integrated rate laws 2 Describe pseudo -order fate laws 4 Describe Beers law and calibration curves. Investigating Oxidation Reaction In this lab activity you will use spectroscopy to investigate the rate of reaction between crystal violet dye and hydroxide ion (Fig, 8.4), Note In Figure 8.4, a shorthand method of representing six-membered carbon rings is used to make the molecular structures easier to read. CH, GH violet FICURE 8.4 Reaction between crystal wolet (CVã£dye and hydrooide ion. rystal violet (CV-) exhibits a deep purple color due to its extensive system of alternating single and double carbon-carbon bonds. However, hydroxide ion (OH) attacks the central carbon in the CV structure, disrupting the single/double bond system, and creating a colorless product, CVOH The reaction given in Figure 8.4 can be rewritten as Reaction 4 CV (aq) +OH (aq)CVOH (a Reaction4 The differential rate law for Reaction 4 can be expressed as shown in Equation 9: Rate = k [CV+]"[OH-]s Eq. In this lab activity, you will take advantage of the dramatic color change in this reaction to track the decrease in the concentration of CV with time (Fig. 8.5), since the color of the solution is directly related to the amount of unreacted CV present. These data will allow you to determine p, the order of reaction witlh respect to CV-. The order of reaction with respect to OH ,q, and the rate constant, k, can be determined by running the reaction with different initial concentrations of OlH CHAPTER 8 Chemical Kinetics
question d and 2 and part E 1 and 2
LAB ACTIVITY Integrated Rate Laws 8.2 Objectives Ar the completion of this lob octivity, you wil be oble to 1 Explain time dependence of reactant concentration Perform a serial dilution and integrated rate laws 2 Describe pseudo -order fate laws 4 Describe Beers law and calibration curves. Investigating Oxidation Reaction In this lab activity you will use spectroscopy to investigate the rate of reaction between crystal violet dye and hydroxide ion (Fig, 8.4), Note In Figure 8.4, a shorthand method of representing six-membered carbon rings is used to make the molecular structures easier to read. CH, GH violet FICURE 8.4 Reaction between crystal wolet (CVã£dye and hydrooide ion. rystal violet (CV-) exhibits a deep purple color due to its extensive system of alternating single and double carbon-carbon bonds. However, hydroxide ion (OH) attacks the central carbon in the CV structure, disrupting the single/double bond system, and creating a colorless product, CVOH The reaction given in Figure 8.4 can be rewritten as Reaction 4 CV (aq) +OH (aq)CVOH (a Reaction4 The differential rate law for Reaction 4 can be expressed as shown in Equation 9: Rate = k [CV+]"[OH-]s Eq. In this lab activity, you will take advantage of the dramatic color change in this reaction to track the decrease in the concentration of CV with time (Fig. 8.5), since the color of the solution is directly related to the amount of unreacted CV present. These data will allow you to determine p, the order of reaction witlh respect to CV-. The order of reaction with respect to OH ,q, and the rate constant, k, can be determined by running the reaction with different initial concentrations of OlH CHAPTER 8 Chemical Kinetics
Trinidad TremblayLv2
5 Jun 2019