cement analysis- department of chemistry- tinsukia college- tinsukia- asom
DESCRIPTION
A presentation of an analysis carried on two brands of cement as a part of the project work awarded by IQAC cell of Tinsukia College to the students of the Department of Chemistry.TRANSCRIPT
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Report on a qualitative analysis carried out on two brands of Portland
Cement.
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Physical Appearance:- Gray, Amorphous.
Uses:- Making concrete, Mortar, Masonry.
Raw materials:- Limestone, Clay, Gypsum (Calcium
Sulphate) , Coal and Water.
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The logos are properties of the respective owners.
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To check the amountTo check the amount of Calcium in of Calcium in
Portland Cement.Portland Cement.
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The experiment was carried out in two
groups.
Group-I analysed Sample A
Group-II analysed Sample B
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Date:
Group-I: Bijumoni, Sujata, Munmi, Kironmoyee, Poli.
Group-II: Shubhadeep, Gopal, Prasenjeet, Satish, Md. Ruhul,
Santosh.
Venue: Deptt. Of Chemistry,
Tinsukia College, Tinsukia, Asom.
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Sample-A> TOPCEM Cement
Sample-B> Star Cement
The logos are properties of the respective owners.
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a. Preparation of Silica-free Stock solution
b. Separation of Fe and Cac. Washing
d. Titration
a. Preparation of Silica-free Stock solution
b. Separation of Fe and Cac. Washing
e. Titration
d. Preparation of Standard KMnO4 soln
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a)0.5 gm of cement is transported to a 250 ml beaker.
b)About 100 ml of hot water is gradually added to the beaker in such a manner that cement is in complete suspension.
c)About 30 ml of concentrated HCl is added gradually. During the addition the mixture is vigourously stirred with a glass rod for 10 minutes.
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d)Then a few drops of Br water is added and the solution is rapidly boiled for few minutes to effect complete solution of practically everything but a few flacks of silica.
e)This is directly filtered out into a 250 ml volumetric flask by adding distilled water.
f)This is the Stock solution.
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a)75 ml of the stock solution is taken into a 250 ml beaker.
b)1-2 ml of concentrated HNO3 is added and heated for 3 minutes. 100 ml of distilled water is then added.
c)1-2 gm of NH4Cl is added.
d)It is then boiled for a few minutes. 1:1 NH4OH is added dropwise with stirring with a glass rod until the smell of Ammonia remains.
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e)The precipitate of Ferric Hydroxide appears.
f)The beaker is now placed on a hot wire gauge. The appearance of colourless supernatent liquid indicates complete precipitation.
g)The precipitate is filtered with a filter paper. (Whatmann no. 41).
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h)The volume of the filtrate is reduced to about 100 ml by evaporation.
i)2 drops of methyl red indicator is added. 4N concentrated HCl is added.
j)Then about 10-15 ml of 10% oxalic acid is added.
k)1:1 NH4OH is added with stirring until smell of Ammonia persists. The precipitate of Calcium Oxalate appears.
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a)The filtrate is washed with distilled water to remove chloride and oxalate .
b)The precipitate is now dissolved in hot 50ml 1:8 H2SO4
and transferred to a 250 ml volumetric flask. The volume is made upto 250 ml.
c)Ca ion is estimated by titrating with N/10 KMnO4 solution.
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a)20 ml of standard Oxalic acid is taken in a 250 ml volumetric flask.
b)150 ml 2N H2SO4 is added.
c)The mixture is heated to 70-80 c and titrated in the hot condition with KMnO4 running from a burrete dropwise.
d)The end point is marked by just appearance of pale pink colour. The end point is noted.
o
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a)50 ml of Oxalic acid is taken in a 250 ml volumetric flask and 100 ml of distilled water is added to it.
b)It is kept on a heated wire gauze to keep it warm (70-80 c).
c)It is then titrated with standard KMnO4.
d)The end point is noted.
o
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Group- IStandardisation of KMnO4
Strength of Oxalic Acid: 0.0504 N
Volume of Oxalic Acid: 20 ml
Strength of H2SO4: 2 N
Volume of H2SO4: 150 ml
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Burette Reading:
1st Reading: 46.9 ml
2nd Reading: 46.6 ml
3rd Reading: 46.6 ml
Concordant value: 46.6 ml
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Group- IIStandardisation of KMnO4
Strength of Oxalic Acid: 0.0504 N
Volume of Oxalic Acid: 20 ml
Strength of H2SO4: 2 N
Volume of H2SO4: 150 ml
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Burette Reading:
1st Reading: 39.9 ml
2nd Reading: 39.1 ml
3rd Reading: 39.1 ml
Concordant value: 39.1 ml
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Group-I analysed Sample-A i.e. Topcem cement and found 0.142
gm/litre of Calcium.
Group-II analysed Sample-B i.e. Star cement and found 0.108 gm/litre of
Calcium.
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Star Cement is of superior quality to Topcem Cement.
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Special Thanks To:
Mrs. Monika Devi, HoD, Deptt. Of Chemistry.
Sri Dibyajyoti Borah, Lecturer.
Miss Pallavi Gogoi, Lecturer.
Dr. Saswati Phookan, Lecturer.
Sri Biplab Banik, Lecturer.
Also Heartful Thanks To:
Sri Anup Roy, Lab-Bearer.
Sri Thomas Sonowal, Lab-Bearer.
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Thanks to:->Internal Quality Assurance Cell
(IQAC)> Department Of Physics <
> Department Of Botany <
> Department Of Zoology <
> Department Of Mathematics <
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