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picture1_Thermal Analysis Pdf 90366 | Chapter 1  Electro Chemical Methods


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File: Thermal Analysis Pdf 90366 | Chapter 1 Electro Chemical Methods
chapter 1 electrochemical methods of analysis potentiometry contents introduction galvanic and electrolytic cells salt bridge electrode potential and cell potential indicator electrodes reference electrodes ion selective electrodes potentiometric methods of ...

icon picture PDF Filetype PDF | Posted on 16 Sep 2022 | 3 years ago
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       Chapter 1 
   Electrochemical methods 
  of Analysis-Potentiometry 
           
                                                      
                                           Contents 
                                                       
      •   Introduction 
      •   Galvanic and electrolytic cells 
      •   Salt bridge 
      •   Electrode potential and cell potential 
      •   Indicator electrodes 
      •   Reference electrodes 
      •   Ion-selective electrodes 
      •   Potentiometric methods of analysis 
           – Direct potentiometry 
           – Potentiometric titration 
       
           
           
           
                                                                                                 2 
                Electroanalytical  Chemistry 
     Electroanalytical chemistry is a group of methods 
      based upon the electrical properties of a solution 
      of the analyte. 
     Electroanalytical techniques are capable of 
      producing very low detection limits. 
     Electroanalytical techniques are often specific for 
      a particular oxidation state of an element, where 
      other techniques are only capable of revealing 
      total concentrations of an element. 
     Electroanalytical techniques require relatively 
      inexpensive equipment. 
     Electroanalytical techniques provide information 
      about activities rather than concentrations. 
        Ordinarily, it’s the activities of ions that are 
         significant in “how things work”. 
       
    Recall from Freshman Chemistry: 
                     
   • Oxidation: Loss of electrons or increase in 
     the oxidation number 
       2+   -    3+ 
   • Fe     +  e    Fe
   •    
   • Reduction: Gain of electrons or decreases in 
     the oxidation state 
       2+     -
   •  Cu    +   2 e     Cu 
   • Redox reaction  
           2+    2+
   • Zn  +  Cu   - Zn   +  Cu 
   • Oxidizing agent: Species that is being 
     reduced and causes an oxidation   
   • Reducing agent: Species that is being 
     oxidized and cause a reduction  
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...Chapter electrochemical methods of analysis potentiometry contents introduction galvanic and electrolytic cells salt bridge electrode potential cell indicator electrodes reference ion selective potentiometric direct titration electroanalytical chemistry is a group based upon the electrical properties solution analyte techniques are capable producing very low detection limits often specific for particular oxidation state an element where other only revealing total concentrations require relatively inexpensive equipment provide information about activities rather than ordinarily it s ions that significant in how things work recall from freshman loss electrons or increase number fe e reduction gain decreases cu redox reaction zn oxidizing agent species being reduced causes reducing oxidized cause...

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