This preview shows pages 1–24. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: 11Chapter 16Redox Titrations12Suggested Text Problems: Chapter 14: 4, 5, 9, 12, 14, 16, 17, 19, 24, 25, 26 Chapter 15: 2, 3, 5, 6, 8, 21, 24, 26, 30, 31, 33, 34(a&b), 35Chapter 16: 1, 2, 3, 5, 6, 7Chapter 17: 2, 3, 4, 10, 14, 15, 16, 21, 22, 26, 27, 28, 2913Text CoverageChapter 14Sections 1, 2, 3, 4, 5Chapter 15Sections 1, 2, 3, 4, 5 (except pp. 308310), 6, 7Chapter 16Sections 1, 2 are the important sections. [In sections 4, 5, 6, 7 just have some general awareness of these applications, i.e., how you could use permanganate, ceric, dichromate, and iodine}Chapter 17Just through Stripping Analysis (p 366middle of 367) and not responsible for Box 173.14Blood Analysis151617Typical Redox TitrationAt the Pt indicator electrode, tworeactions come to equilibriumboth equilibria established at the Pt electrode.18Regions of a Redox Titration Curve1. Before titrant added, cannot calc. (no Fe+3) 2. Titrant added, before equivalence point3. Equivalence point4. Past equivalence point19110Region 1: Before the Equivalence PointOne special point is reached before the equivalence point. When the volume of titrantis onehalf of the amount required to reach the equivalence point(V= ½Ve), [Fe3+] = [Fe2+]. In this case, the log term is 0, and E+= E° for the Fe3+ Fe2+couple. The point at which V = ½Veis analogous to the point at which pH= pKawhen V = ½Vein an acidbase titration.111Region 2: At the Equivalence PointAdding these two expressions:[Ce3+] = [Fe3+] and [Ce4+] = [Fe2+] at equiv. pt.112Region 2: At the Equivalence PointBecause [Ce3+] = [Fe3+] and [Ce4+] = [Fe2+] at the equivalence point, the ratio of concentrationsin the log term is unity. Therefore, the logarithmis 0 113Region 3: After the Equivalence Point114Theoretical curve for titrationof 100.0 mL of 0.010 0 M Tl+with 0.010 0 M in 1.00 M HCl.115Theoretical curve for titrationof 10.0 mL of 0.010 0 M Tl+with 0.010 0 M IO3in 1.00 M HCl. The equivalence pointat 0.842 V is not at the center of the steep part of the curve. When the stoichiometryof the reaction Is not 1:1, the curve is not symmetric. 116Redox Indicators117118119120121Chapter 17Electroanalytical Techniques122Fundamental of ElectrolysisPlace Cu and Pt electrodesinto a solution of Cu2+and force electric currentthrough to deposit copper metal at the cathodeand to liberate O2at the anode123Electrolysis SchematicThe electrodeat which the reaction of interest occurs is called the working electrode. In Figure 171, we happen to be interested in reductionof Cu2+, so Cu is the working electrode...
View
Full
Document
This note was uploaded on 07/23/2010 for the course CHM 3120 taught by Professor Harrison during the Fall '08 term at University of Florida.
 Fall '08
 Harrison
 Analytical Chemistry, Redox

Click to edit the document details