Titration is a common laboratory technique for quantitative chemical analysis, to determine the concentration of a specific analyte/solute by comparing it with the known concentration of a solution in the presence of an indicator.
Titration is classified into four different types based on goals and processes such as acid-base titration, redox titration, precipitation titration, and complexometric titration.
What is redox titration?
Redox titration is an analytical method to determine the concentration of sample analyte, redox reactions are oxidation-reduction chemical reactions in which the oxidation states of the reactants change. In which a redox indicator solution or potentiometer is used to determine the endpoint.
There are different types of redox titration depending on the titrant used, such as permanganometry, iodometry, bromatometry, iodimetry, cerimetry, and dichrometry, and based on the method are direct titration and back titration.
The reactions involved in redox titration are redox reactions in which electrons are transferred and oxidation states are changed. As a result, redox titrations are a useful way to learn more about the substances we come into contact with.
Concept of oxidation and reduction:
Oxidation:
It could be described as the loss of electrons to an oxidizing agent to produce a more positive or higher oxidation state.
Reduction:
It could be described as gain electrons from a reducing agent to produce a more negative or lower oxidation state.
Applications of redox titration:
Redox titrations have numerous applications in chemistry, industrial analyses, food industries, pharmaceutical preparations, agriculture, environmental analysis, and other fields. Its common example is the titration of sulfite in wine using iodine, as well as that of alcohol, which can be determined based on its oxidation by potassium dichromate (K2Cr2O7).
- Industrial applications of redox titration:
Evaluation of chlorination of public water sources is one of the most important industrial applications of redox titration. As well as to determine the purity or content analysis of raw materials, oxidation-reduction reactions are also used.
- Pharmaceutical applications of redox titration:
Redox titration is used in pharmaceutical analysis to measure the concentration of active pharmaceutical ingredients (concentration of iron) in pharmaceutical goods, such as tablets, capsules, and other medicinal products.
- Applications of redox titration in chemistry:
Redox reaction is most commonly used to identify elements with medium and high concentrations. Many inorganic analytes can be analyzed using redox titrimetry. In inorganic analysis, it is used to determine the water content in a non-aqueous solvent using Karl Fischer reagent as a titrant. As well as dissolved oxygen can be a determination by this method.
- Applications of redox titration in food:
The food industry makes broad use of an analytical method that enables it to estimate how much of a reactant is present in a sample. Redox titration can be used to measure the concentration of salt, sugar content as well as vitamin C, and E content present in a food product.
Some of the real-life applications and common applications of redox reactions are as follows.
- It is used to purify metals.
- It is used in environmental analysis for the determination of dissolved oxygen.
- Redox reactions are used to manufacture a wide variety of chemicals, including chlorine and caustic soda.
- Redox Reaction is used in combustion
- Redox Reaction is used in electrochemistry
- Redox Reaction is used in photosynthesis applications
- Redox Reaction is used in photographic Films
- Redox reactions are used in the electroplating process
- Oxidation-reduction reactions are used to sanitize water and bleach materials.
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