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Index
1.Acknowledgement
2.Certificate
3.Aim
4.Requirement
5..Procedure
6.Observations
7.Result
.8.Bibliography
Chemistry Project
On
Casein in different samples
Of milk
Submitted by:
Kartik Sharma
XII-Sciences
Roll.no-5
Submitted to:
Mr Vineet Ranot
(PGT Chemistry)
Acknowledgement
Primarily i would like to thank god for being able to complete
this project with success.Then i would like to thank my
chemistry teacher Mr Vineet Ranot whose valuable guidance
has been the ones that helped me patch this project and make
it a full proof success his suggestions and his instructions have
served as the major contributor towards the completion of this
project
Then i would like to thank my parents and friends who
have helped me with their valuable suggestions and
guidance
Kartik Sharma
Certificate
This is to certify that Master Kartik Sharma of Gurukul
International School,Solan of class
XII-Sciences,Roll.no-5 has successfully completed his
chemistry project file.He has taken proper care and
utmost sincerity in completion of his project. All the work
related to this project was done by the candidate
himself. The approach towards the subject has been
sincere.
I certify that this project file is upto my expectation and
as per the guidelines issued by CBSE.
(PGT Chemistry) Principal
Aim: To study the quantity of casein present in
different samples of milk.
Requirement
Apparatus: Two 250m ml beakers, glass rod, test
tubes,weight box, burner, burner, filter paper, funnel,
filtration Flask, buchner funnel, water pump, etc.
Chemicals: Different samples of milk, saturated ammonium
sulphate solution, 10% acetic acid.
Procedure
i.Take a 250 ml beaker.Clean it with water and dry.Put into it 100 ml of cow's
milk.
ii.Add 50 ml of saturated ammonium sulphate solution to it slowly with constant
stirring.The fat present in it will precipitate out along with casein.
iii. Filter the solution and transfer the precipitate in another 250 ml beaker.
v.Wash the precipitate with about 50 ml of distilled water.Only casein will
dissolve in water forming milky solution leaving the fat undissolved.
v.Heat the milky solution to about 40 and then add 10% acetic acid solution
dropwise when casein gets precipitated completely.
vi.Filter the precipitate.Wash it with water and then with alcohol.
vii.Dry the precipitate in a desiccator.
viii.Weigh the dry solid mass of casein in a already weighed watch glass
ix.Repeat the experiment with the same quantity of other samples of milk.
Observations
Name of
milk
Weight of
casein
(ml)
Volume of
Milk taken
(W1g)
Weight of
Milk
(W2g)
Percentage
of casein
Buffalo milk 20 23.09 0.632 2.73%
Cow milk 20 35.66 0.55 1.64%
Goat milk 20 23.09 0.77 3.67%
Result: Different samples of milk contain
different percentage of casein.
Highest percentage of casein is present in
Goat's milk
Biblography
1.Wikipedia.com
2.Chemiprojects.blogspot.in
3.Scribd.com

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Untitled presentatio.pptx.pdf

  • 2. Chemistry Project On Casein in different samples Of milk Submitted by: Kartik Sharma XII-Sciences Roll.no-5 Submitted to: Mr Vineet Ranot (PGT Chemistry)
  • 3. Acknowledgement Primarily i would like to thank god for being able to complete this project with success.Then i would like to thank my chemistry teacher Mr Vineet Ranot whose valuable guidance has been the ones that helped me patch this project and make it a full proof success his suggestions and his instructions have served as the major contributor towards the completion of this project Then i would like to thank my parents and friends who have helped me with their valuable suggestions and guidance Kartik Sharma
  • 4. Certificate This is to certify that Master Kartik Sharma of Gurukul International School,Solan of class XII-Sciences,Roll.no-5 has successfully completed his chemistry project file.He has taken proper care and utmost sincerity in completion of his project. All the work related to this project was done by the candidate himself. The approach towards the subject has been sincere. I certify that this project file is upto my expectation and as per the guidelines issued by CBSE. (PGT Chemistry) Principal
  • 5. Aim: To study the quantity of casein present in different samples of milk.
  • 6. Requirement Apparatus: Two 250m ml beakers, glass rod, test tubes,weight box, burner, burner, filter paper, funnel, filtration Flask, buchner funnel, water pump, etc. Chemicals: Different samples of milk, saturated ammonium sulphate solution, 10% acetic acid.
  • 7. Procedure i.Take a 250 ml beaker.Clean it with water and dry.Put into it 100 ml of cow's milk. ii.Add 50 ml of saturated ammonium sulphate solution to it slowly with constant stirring.The fat present in it will precipitate out along with casein. iii. Filter the solution and transfer the precipitate in another 250 ml beaker. v.Wash the precipitate with about 50 ml of distilled water.Only casein will dissolve in water forming milky solution leaving the fat undissolved. v.Heat the milky solution to about 40 and then add 10% acetic acid solution dropwise when casein gets precipitated completely. vi.Filter the precipitate.Wash it with water and then with alcohol. vii.Dry the precipitate in a desiccator. viii.Weigh the dry solid mass of casein in a already weighed watch glass ix.Repeat the experiment with the same quantity of other samples of milk.
  • 8. Observations Name of milk Weight of casein (ml) Volume of Milk taken (W1g) Weight of Milk (W2g) Percentage of casein Buffalo milk 20 23.09 0.632 2.73% Cow milk 20 35.66 0.55 1.64% Goat milk 20 23.09 0.77 3.67%
  • 9. Result: Different samples of milk contain different percentage of casein. Highest percentage of casein is present in Goat's milk