Question

What do you mean by volumetric analysis? How do you classify the reactions which are involved in volumetric analysis?

Answer 1

Hint : Volumetric analysis is a frequently used quantitative analytical approach. As the name implies, this approach entails determining the concentration of an analyte by measuring the volume of a solution whose concentration is known.

Complete Step By Step Answer:
Volumetric analysis is an analytical method for estimating the concentration of a substance in a solution by adding exactly the same number of equivalents of another substance existing in a solution of known concentration.
The solution we wish to examine includes an unknown amount of chemical, and the reagent reacts with that chemical in the presence of an indicator to reveal the end-point. The reaction is complete when the end-point is reached.
The volumetric analysis can be classified into three types:
-Simple titration
-Back titration
-Double titration
Simple Titration: The main aim of simple titration is to determine the concentration of an unknown solution using the concentration of another solution that is known.
1. Simple titration is further classified into four types:
-Acid-Base titrations
-Redox Titrations
-Precipitation Titrations
-Complexometric titrations
2. Back Titrations: A back titration is a titration method that involves reacting an analyte with a known amount of excess reagent to determine its concentration. The remaining of the excess reagent is then titrated using a different reagent.
3. Double Titrations: The titrate (unknown concentration) solution contains more than one component in this form of titration. The method uses phenolphthalein and methyl orange as indicators (indicators are chemicals that change colour when a reaction is complete).

Note :
To determine the concentration of a simple solution, titrate it with the volume of a typical acid solution (of known concentration) required to neutralise it. The aim of the titration is to discover the equivalence point, or the point at which chemically equivalent amounts of the reactants are mixed.