Study of Oxalate Ion Essay

1377 Words 6 Pages
St. John’s Senior Secondary School and Junior College Mandaveli Chennai – 600028

A CHEMISTRY PROJECT “STUDY OF THE OXALATE ION CONTENT IN GUAVA FRUIT” Submitted in the partial Fulfilment of the requirement for AISSCE 2010-2011

By Abdud Dayan Adeeb Of Class XII C

St. John’s Senior Secondary School and Junior College Mandaveli Chennai – 600028

A CHEMISTRY PROJECT “STUDY OF THE OXALATE ION CONTENT IN GUAVA FRUIT” Submitted in the partial Fulfilment of the requirement for AISSCE 2010-2011

By Jagadeesh Sekar Of Class XII C

CONTENTS
          

INTRODUCTION OBJECTIVE OF THE PROJECT REQUIREMENTS THEORY CHEMICAL EQUATIONS PROCEDURE PRECAUTIONS OBSERVATIONS CALCULATIONS CONCLUSION BIBLIOGRAPHY

STUDY OF OXALATE
…show more content…
6|Page

CHEMICAL EQUATIONS
Molecular Equations

2KMnO4 + 3H2SO4 HOOC-COOH.2H2O +[O]

K2SO4 + 2MnSO4 + 2H2O + 4[O]

   

60  70 o C

2CO2 + 2H2O x 5

3KMnO4 + 3H2SO4 +5 HOOC-COOH.2H2O K2SO4 + 2MnSO4 + 18H2O + 10CO2

Ionic Equations
MnO4- +16H+ + 5eC2 O 4 Mn2+ + 4H2O 2CO2 + 2ex 2 x 5

2MnO4- + 16H+ + 5C2O42-

2Mn2+ +8H2O + 10CO2

7|Page

PROCEDURE
1. Weigh 50.0g of fresh guava and crush it to a fine pulp using pestlemortar.

2. Transfer the crushed pulp to beaker and add about 50 ml dil. H2SO4 to it

8|Page

3. Boil the contents for about 10 minutes.

4. Cool and filter the contents in a 100 ml measuring flask. Make the volume upto 100 ml by adding distilled water.

9|Page

5. Take 20 ml of the solution from the measuring flask into a titration flask and add 30 ml of dilute sulphuric acid to it.

6. Heat the mixture to about 60oC and titrate it against

KMnO4 solution

taken in a burette. The end point is appearance of permanent light-pink colour.

7. Repeat the above experiment with 50.0 g of 1, 2 and 3 days old guava fruit.
10 | P a g e

PRECAUTIONS
1. KMnO4 solution is always taken in the burette. 2. Avoid the use of burette having a rubber tap as KMnO4 attacks rubber. 3. In order to get some idea about the

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