Precipitation titrations: Introduction

• Precipitation titrations are a type of volumetric analysis in which a titrant is added to a solution containing an analyte to form a sparingly soluble precipitate.
• The endpoint of the titration is reached when the analyte has completely reacted with the titrant, and no further precipitation occurs.
• Precipitation titrations are often used to determine the concentration of a specific ion in a solution.
• They are particularly useful when the solubility of the precipitate formed is low, and the reaction between the titrant and the analyte is selective.

Argentometric Titrations:

• Argentometric titrations are a class of precipitation titrations that use silver ions (Ag⁺) as the titrant.
• These titrations are primarily employed for the determination of halide ions (chloride, bromide, and iodide) and other anions, such as thiocyanate, in a solution.
• Silver nitrate (AgNO₃) is the most commonly used titrant in argentometric titrations.

1. Mohr’s Method
2. Volhard’s Method
3. Modified Volhard’s Method (Direct Volhard’s Method)
4. Fajans Method (Adsorption Indicator Method)

This arrangement provides a clear, logical flow from general information on precipitation titrations to the specifics of argentometric titrations and their various types.

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