Iodometric and iodimetric Titration

Presentation slide on iodometric and iodimetric titration for the student seeking a quality slide on the subject. I added the following topics to this slide:
1.CONTENT
2.Titration
3.Types of Titration
4.Redox titration
5.Iodometry
6.Iodimetry
7.Difference between iodometric and iodimetric titration
8.Analytical applications on Iodometric and Iodimetric titration
9.Conclusion

1. Iodometric &
Iodimetric
Titration

2. CONTENT
•Titration
•Types of Titration
•Redox titration
•Iodometry
•Iodimetry
•Difference between
iodometric and iodimetri c
titration
•Analytical appli cations
on Idometri cand
Iodimetri ctitration
•
Conclusion

3. Titration
A titration is technique where a solution of known concentration
is used to determine the concentration of unknown solution.
Asolution whose concentration is known is called as
standard solution
The solution whose concentration is unknown is called as
sample solution

4. Types of Titration
•Acid-base titration
•Redox titration
•Gas-phase titration
•Complexometrictitration
•Zeta potentialtitration
•Assay

5. Redox titration
A redox reaction involves an oxidation and reduction reaction between the analyte
and the titrant.
There are a lot of redoxtitrationsclassified according to the titrantused:
1) Permanganimetric : Titrant KMnO
4
2) Dichromatometric: Titrant K
2Cr
2O
7
3) Titrationsinvolving iodine (I
2)
•Iodimetry
•Iodometry

6. IODOMETRY
Iodometry: Not a direct titration because there are 2 reactions:
analyte + I
-
→ I
2
unknown
I
2
+ titrant (standard thiosulfate) →product
Known
The method is called iodometry when a solute (oxidizing
agent) is added to excess iodide to obtain iodine, and the
amount of iodine produced is estimated by titration with a
sodium thiosulfate solution.

7. Iodimetry
Prod
uct A
solution.
Iodimetry: A direct titration with only 1 reaction:
analyte + titrant (iodine I
2
) →product
(iodide I
-
)
unknown known
Iodimetry is a method for titrating a compound
(reducing agent) directly with a standard iodine
solution.

8. Difference between iodometric and iodimetric
titrati on
Iodometric titration Iodimetrictitration
Iodimetrictitration is an indirect
titration method.
Iodometric titration is a direct
titration method
.
Two redox reactions occur in this
titration.
One redox reaction occurs in this
titration.
It is used to quantify the oxidizing
agent.
It is used to quantify the reducing
agent.

9. Analytical applications on Idometricand Iodimetrictitrati on
There are too many applications of iodometry and iodimetry . Some of them are:
1.Determination of Sulfites and hydrogensulfites:
Sulfites and hydrogensulfitesreduce iodine readily in acidic medium to
iodide
SO
3
2
-
+ I
2+ H
2O= SO
4
2-+2H
+
+2I
-
HSO
3
-
+ I
2+ H
2O= SO
4
2-+3H
+
+2I
-

10. 2.Determination of Sulfides and hydrogensulfides:
The excess arsenic trioxide is then determined by titrating against standard
iodine solution using starch indicator
As
2O
3 + 3H
2S=As
2S
3 + 3H
2O
Analytical applications on Idometricand Iodimetrictitrati on

11. Conclusion
Although the names iodometry and iodimetry seem
similar, they represent two distinct analytical chemistry
methods.
Themaindistinctionbetweeniodometryand
iodimetry is that iodometry may be used to measure oxidising
agents whereas iodimetry can be used to measure reducing
agents.

12. THANK YOU