Question

What is the difference between iodometric and iodimetric titration?

Answer 1

Hint: As we know that iodometry and iodimetry are two most common titration methods used in analytical chemistry. These titrations are based on oxidation reduction and therefore can be used to determine redox species quantitatively. We also know that titrations are based on a reaction between the analyte and a standard reagent which is known as the titrant. Iodine can be used for redox titrations because of its capability of reacting fast with many species.

Complete answer:
Let us understand the basic definition of iodometric and iodimetric titrations followed by the difference between them as follows:-
Iodometric titrations: When an analyte (an oxidizing agent) is added to excess iodide to yield iodine and the iodine produced is determined by titration with sodium thiosulfate solution, then the method is called iodometry.
Iodimetric titrations: When an analyte (a reducing agent) is titrated directly with a standard iodine solution, the method is known as iodimetry.
The difference between iodometric and iodimetric titration is as follows:-

Iodometric Titrations	Iodimetric Titrations
Unlike iodometry, it is an indirect titration method.	It is a direct titration method.
Here the total number of redox reactions is two.	Here the number of redox reactions is one.
Here initially iodine will get oxidized and then get reduced by the reducing agent.	Here iodine will get reduced.
It is used to quantify oxidizing agents.	It is used to quantify reducing agents.

Note:
-Remember that the reversibility between iodine and iodide is also an advantage when using them in iodometric reactions.
-Also try to understand all types of titrations which are involved in inorganic, organic and analytical chemistry so as to answer these types of questions.