1.
Chemistry Investigatory Project
2020-2021
Topic : INVESTIGATION PROJECTON L ASCORBICACID
Guided By : Mr. MAHENDRE KALRA
Submitted By : TARUN GUPTA(XII -‘A’)

2.
CONTENT
➢Certificate
➢Introduction
➢Acknowledgement
➢Index
▪ AIM
▪ THEORY
▪ STRUCTURE
▪ USES
▪ REQUIREMENT
▪ PROCEDURE
▪ RESULT
▪ CONCLUSION

3.
Certificate
This is to certify that TARUN GUPTAof class 12‘A’, KENDRIYA
VIDYALAYA NO.2, ITARANA has successfully completed the project on
the tocpi “INVESTIGATION PROJECTON L ASCORBICACID” under guidance of MR.
MAHENDRE KALRA in session 2019-20.
Internal examiner External examiner
PRINCIPAL

4.
Chemistry
project
INVESTIGATION PROJECTON
L ASCORBICACID

5.
ACKNOWLEDGEMENT

6.
• INDEX:
• 1.AIM
• 2.THEORY
• 3.STRUCTURE
• 4.CHEMISTRY
• 5.USES
• 6.REQUIREMENTS
• 7.PROCEDURE
• 8.RESULT
• 9.CONCLUSION

7.
AIM:
To study and calculate the content of asorbic acid in different citrus and fruit .
THEORY:
STRUCTURE

8.
L-Asorbic acid:

9.
CHEMISTRY
1.ACIDITY
2.TAUTOMERISM

10.
3. DETERMINATION
• . The concentration of soluble of ascorbic acid can be determined in
many ways, the most common way involves titration with an
oxidation agent.
4. IODINE
• Another method involving using iodine and starch indicator , where
in iodine reacts with ascorbic acid, and when all the ascorbic acid
has reacted , the iodine is excess,the forming a blue and black
complex with starch indicator. The indicates the end point of the
titration as an alternative ascorbic acid can be reacted with iodine in
excess, followed with sodium thiosulphate while using starch as
indicator. The concentration of soluble of ascorbic acid can be
determined in many ways;the most common way involves titration
with an oxidation agent.

11.
5.Iodine and iodate
The above method involving iodine require making up and standardizing the iodine
solution. One way around this is to generate iodine in presence of ascorbic acid by the
reaction of iodate and iodide ion in acid solution
USES.

12.
REQUIREMENT
❖WATER
❖STARCH
❖IODINE(Solid)
❖LEMON JUICE
❖ORANGE JUICE
❖GOOSEBERRY JUICE
❖BURETTE
❖PIPETTE
❖CONCICAL FLASK SATRDARD
❖BUNSEN BURNER
❖MUSLIN CLOTH

13.
PROCEDURE

14.
OBSERVATION TABLE
1). LEMON JUICE:

15.
CALCULATION:

16.
2).ORANGE JUICE:

17.
CALCULATION:

18.
3).GOOSEBERRY-JUICE:

19.
CALCULATION:

20.
RESULT
CONCLUSION