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Thursday, August 5, 2021

Difference between volumetric analysis and titration

The major difference between volumetric analysis and titration is that volumetric analysis is used to analyze a sample solution for several different unknown analytes, whereas titration is used to determine the concentration of a single unknown analyte in a sample solution.

Quantitative chemical analysis is a branch of chemistry that deals with determining the percentage or amount of one or more compounds present in a sample. Quantitative analysis is performed using different methodologies, which can be classified as chemical or physical depending on which properties are used. Absorption or polarization of light, density, electromotive force, refractive index, magnetic susceptibility, and many others are all examples of physical methods. Neutralization, precipitation, oxidation, and formation of a new compound are all examples of chemical reactions. Gravimetric analysis and volumetric or titrimetric analysis are the two most common forms of chemical methods.

Volumetric analysis is an easy method that can be used to analyze the solutes of a sample solution. This technique can only be used for solutions because it is applied regarding the volumes of solutes. Volume analysis is often referred to as titrimetric analysis for titration. However, when considering their applications there is a difference between titration and volumetric analysis.

What is titration?

Titration is a quantitative method used to determine the concentration of the analyte of an unknown solution. It is a reaction between the titrant and the titrand. The titrant is a chemical with a known concentration that is filled in a burette and added dropwise in the sample until the reaction is complete. Titrand is an analyte compound to be titrated, generally which is in a conical flask. An indication is used to determine the reaction's equivalence point or endpoint, which is indicated by a color change in the solution when the endpoint is achieved. However, in some types of titrations, an indicator is not necessary since the reactants can act as self indicators.  

There are four types of titrations based on the chemical reaction between the titrant and the analyte, such as acid-base titration, redox titration, complexometric titration, and precipitation titration, and each works on its principle. It is performed either manually or automatically using instruments, usually, a burette, beaker, conical flask, pipette, volumetric flask, and funnel are required to carry out the titration process. 

What is volumetric analysis?

Volumetric analysis is a type of quantitative analysis which is used to determine the concentration of an unknown compound using its volume. In other words, volumetric analysis or titration is the measurement of the volume of a second substance that reacts with the first in known proportions. In volumetric analysis, the quantity of a solute is determined in situations where a solution of many different unknown values ​​is to be analyzed.

It is used to determine the value of multiple components in a sample solution. Volumetric analysis is performed by measuring the volume occupied by it or by measuring the volume of a second substance that is associated with it in known proportions. Volumetric analysis can be classified into three types: simple titration, back titration, and double titration. However acid-base, redox, and complexometric reactions are also some of the most typical volumetric analysis applications, these reactions involve the use of a known solution to analyze a specific volume of an unknown sample. 

Difference between volumetric analysis and titration:

  • Volumetric analysis is used in circumstances when the analysis is carried out for the many different unknown values, whereas titration is carried out to find the concentration of an unknown component in a solution.
  • Volumetric analysis is a main category for analysis, whereas titration is a sub-category of volumetric analysis.
  • Volumetric analysis is performed either by measuring the volume occupied by an analyte, or by the volume of the second analyte which combines with it in known proportions, whereas Titration is performed by simply reacting a titrant with a sample solution in which the analyte is already there in order to measure the concentration of that analyte in the solution.

Commonly asked questions on titration are as follows.

Which indicators are used in the different titration methods?
Phenolphthalein, thymol blue, bromothymol blue, methyl orange, methyl red, methyl violet, methyl yellow, crystal violet, eriochrome black T, litmus, and starch indicator are some of the indicators used in different titration methods according to the reaction.

What are the methods used to determine the endpoint?
Indicator, potentiometer, pH meter, conductivity, color change, precipitation, thermometric titrimetry, spectroscopy, amperometry, and temperature change are all methods for determining the endpoint.

Why is titration known as volumetric analysis?
Titration is known as volume analysis because volume measurements play an important role in titration. It is a common laboratory method of quantitative chemical analysis used to determine the concentration of a sample.



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