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Chapter 14

Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14. Chapter 14.

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Chapter 14

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  1. Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Application of Ultraviolet/Visible Molecular Absorption Spectrometry Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14 Chapter 14

  2. Quantitative Analysis by Absorption Measurement • Scope • Application to absorbing species • Application to non-absorbing species • Procedural Details • Selection of wavelength • Variables that influence absorbance • Cleaning and handling of cells • Determination of the relationship between absorbance and concentration • The standard addition method • Cs = A1CxVx/((A2-A1)*Vx)

  3. Standard Addition Method 1.000 0.800 m =0.03820 Absorbance 0.600 0.400 b = 0.2412 0.200 Vs = -6.35 0.0 10.0 20.0 -10.0 Volume standard solution mL

  4. Two Component Mixture M + N Absorbance N M l’’ l’ Wavelength

  5. es = ep = 0 et >0 es > 0 ep = et = 0 Absorbance Absorbance Volume of titrant Volume of titrant et > ep > 0 es = 0 es > et > 0 ep= 0 es = 0 ep > et > 0 Absorbance Absorbance Absorbance Volume of titrant Volume of titrant Volume of titrant Typical Photometric Titration Curves ep > 0 es = et = 0 Absorbance Volume of titrant

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