Page 22 - Pharmaceutical_Analytical_Chemistry_1_Theoretical_Notes_Level_1 2024-2025
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Types of Non-aqueous Titrations .............................................................................99
Applications of Non-aqueous Titrations ................................................................100
Solubility and Ksp (Three important definitions) ..................................................104
Requirements for precipitation titrations ...............................................................104
Significance of Ksp ................................................................................................108
Ksp and Molar Solubility ....................................................................................... 111
Fractional Precipitation .......................................................................................... 114
1. Common-ion effect ............................................................................................ 115
2. Effect of pH ........................................................................................................ 115
3. Complex-Ion Effect ............................................................................................ 116
4. Effect of Temperature ........................................................................................ 117
5. Effect of Solvent ................................................................................................ 118
Precipitation Titrations Methods ............................................................................ 119
Detection of the End Point in Argentometric Titrations ........................................120
1. Mohr’s Method ................................................................................................120
Principle of Mohr’s Method ...................................................................................121
Precautions of Mohr’s Method ..............................................................................122
2. Volhard’s Method .............................................................................................125
Principle of Volhard’s Method ...............................................................................126
Precautions of Volhard’s Method ...........................................................................128
3. Fajans’ Method ...................................................................................................129
Theory of Fajans’ Method ......................................................................................130
