The nature of the reaction that occurs between titrant and analyte is the major difference between acid-base titration and redox titration. In an acid-base titration, a neutralization reaction occurs between the acidic or basic titrant and the analyte, whereas in redox titration, an oxidation and reduction reaction occurs between the titrant and the analyte.
Titration is also known as volumetric analysis or titrimetry. It is a typical quantitative chemical analysis method used to determine the concentration of an analyte. Titration is performed by placing a burette with a known concentration of titrant over a conical flask or beaker containing a solute. The titrant is added until the reaction is complete; the endpoint or equivalence point is usually indicated with an indicator that changes the color of the solution. There are four types of titration such as acid-base titrations, redox titrations, precipitation titrations, and complexometric titrations, each of which involves a different type of chemical reaction.
| Table of Contents |
What is acid-base titration?
An acid-base titration is a quantitative analysis method used to estimate the concentration of an acid or base with a known concentration standard solution to properly neutralize the acid or base, with a pH indicator monitoring the reaction. The concentration (molarity) of a compound solution can be determined if the acid dissociation constant (pKa) of the acid or the base dissociation constant (pKb) of the base is known. If the compound has a known concentration, the pKa can be calculated by generating a titration curve.
The titration of sodium hydroxide (NaOH) with acetic acid (HC2H3O2) is one of the examples of acid-base titration. The major types of acid-base titration are strong acid-strong base titrations, strong acid-weak base titrations, weak acid-strong base titrations, and weak acid-weak base titrations.
What is redox titration?
Redox titration is a technique for determining the concentration of a given compound due to the redox reaction between the titrant and the compound. It has two reactions; an oxidation reaction and a reduction reaction. To evaluate the redox titration, it is necessary to obtain the shape of the titration curve that is consistent.
The titration of potassium permanganate (KMnO4) against oxalic acid (C2H2O4) is one of the examples of redox titration. The major types of redox titrations are iodometry, iodimetry, bromatometry, cerimetry, permanganometry, and dichrometry, etc.
Difference between acid-base titration and redox titration:
- In an acid-base titration, a neutralization reaction occurs between the acidic or basic titrant and the analyte, whereas in redox titration, an oxidation and reduction reaction occurs between the titrant and the analyte.
- Acid and base species are involved in an acid-base titration, whereas redox species are involved in redox titration.
- The species in an acid-base titration participate in a neutralization reaction that forming a water molecule, whereas the species react in redox titrations through oxidation and reduction processes.
- Acid-base titrations are more common because they can be done with any type of acid or base, weak or strong, whereas redox titrations are commonly seen between 'd' block elements.
- In acid-base titrations, weak acids or weak bases are used as indicators, whereas in redox titration, most often either the solute or the titrant acts as a self indicator or special redox indicators are used.
- The endpoint of an acid-base titration is generally determined using a pH indicator, a pH meter, or a conductivity meter, whereas the endpoint of a redox titration is generally determined using a redox indicator or self indicator or a potentiometer.
You may also like this
No comments:
Post a Comment