Sunday, April 12, 2020

What is the principle of volumetric analysis?

Volumetric analysis is a sub-branch of a quantitative analytical method that is broadly used. This process can precisely determine the quantity of a substance in terms of volume, thus the name volumetric analysis. For this type of analysis, a solution of a substance that is to be calculated is taken and a known quantity of another substance whose concentration is determined. When the chemical reaction is completed, the volume of the solution is measured.

The endpoint of this reaction is specifying by a change in precipitation or color etc. So in this measurement process, the estimated volume of two analytes is taken and the concentration of one of them is recognized then conveniently measured the concentration of the other.

The basic principle of volumetric analysis is as follows.
  • The sample solution to be analyzed have unknown amounts of the substance.
  • The solution that is of unknown concentration reacts with an unknown amount of compounds in the presence of an indicator to indicate the endpoint of the titration.
  • Volume is measured by titration that completes the reaction between the solution and the reagent.
  • The volumes of the solution are determined by titration that completes the solution and reagent reaction.
  • Reagents quantity and concentration used in the titration indicate the volume of solution and reagent.
  • The quantity of unknown substances in the specific solution volume is calculated by the equation mole fraction.
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