Submission of Proposal under Star College Scheme

Ferrous sulphate
10 gm of ferrous sulphate in little amount of water add 10 cm³ dil H₂SO₄ and dilute to 100 cm³ with water

17	Methyl red 1 gm in 100 cm^3 methanol
18	Methylene blue 0.1 gm in 100 cm^3 water
19	Molybdate A Dissolve 45 gm of ammonium molybdate in mixture of 40 cm^3 of liquor ammonia and 60 cm^3 of water and add 120 gm of ammonium nitrate make up the volume to one liter with water.
20	Molybdate B Dissolve mixture of 38 gm of ammonium molybdate and 25 gm of ammonium nitrate in 62 cm^3 of conc HNO^3 and make the volume up to one liter with water
21	Sodium hydroxide in α – napthol 10 gm of α – napthol in 100 cm^3 of 10% NaOH solution
22	Sodium hydroxide in β – napthol 10 gm of β – napthol in 100 cm^3 of 10% NaOH solution
23	Nesselers reagent Add 10% KI solution to 5% HgCl2 solution till a precipitate form get just dissolve and then add equal volume of 5% KOH solution to it
24	Oxine reagent 2 gm of solid in 100 cm3 of acetic acid
25	Phenyl hydrazine 25 gm of substance in one liter of water
26	Picric acid 50 gm of picric acid in 100 cm^3 of ethanol
27	Potassium ferricynide 55 gm of solid in one liter of water
28	Potassium ferrocynide 53 gm of solid in one liter of water
29	Potassium hydroxide (alcoholic) 10 gm of KOH in 100 cm^3 of 50% ethanol
30	Potassium iodide 5 gm of KI in 100 cm^3 of water
31	Potassium permangnate 3 gm of potassium permangnate in one liter of water
32	Silver nitrate 5 gm in 100 cm^3 of distilled water
33	Silver sulphate 5 gm in 100 cm^3 of water
34	Sodium nitroprusside 10 gm of solid dissolve in one liter of water
35	Stannous chloride 3 gm of stannous chloride in 40 cm^3 of conc. HCl and make up the volume up to 100 cm^3

Section D


Projects for U.G. students


D – 1 Projects for F.Y.B.Sc. students
D – 2 Projects for S.Y.B.Sc. students
D – 3 Projects for T.Y.B.Sc. students


D – 1
Projects for
F.Y.B.Sc. students


Project: 1
Aim:
Acidity of carbonated drinks


Experiment:
To determine the acidity of various carbonated drinks.


Requirements:

1. 
   Cans of carbonated drinks,
   
2. 
   pH meter
   
3. 
   Bottle of 9.2 pH reference
   
4. 
   Bottle of 4.0 pH reference
   

Procedure:

1. 
   Standardize the pH meter with pH 4 and pH 9.2
   
2. 
   Pour the 50 cm³ of the carbonated drinks in 100 cm³beakers.
   
3. 
   Allow it to degas some time.
   
4. 
   Measure the pH of each carbonated drinks.
   

Sr. No.	Name of carbonated drink	pH
1	Coke
2	Diet Coke
3	Thums up
4	Pepsi
5	Limca
6	Sprite

Result:


Project: 2
Aim:
To study the action of heat on hydrated copper sulphate crystals.


Procedure:

1. 
   Take about 1.0 g of blue copper sulphate crystals in a test tube.
   
2. 
   The test tube is fixed to a clamp and kept in an inclined position.( this is done to ensure that any water vapour that condences on the upeer parts of the test tube does not trickle back into the test tube) .
   
3. 
   White anhydrous copper sulphate is placed ( in a watch glass ) below the open end of the test tube.
   

Observation:

1. 
   The blue solid in the test tube slowly turns white.
   
2. 
   A mist of water droplets form on the upper cool portion of the test tube.
   
3. 
   The white copper sulphate in the watch glass turns blue as the drops of water trickle down onto it.
   

Conclusion:
Copper sulphate looses its water of crysallisation when heated and becomes white. On adding water to anhydrous copper sulphate, copper sulphate once again recombines with a certain amount of water and regains its blue colour.
Part-2
On very strong heating ,the white anhydrous copper sulphate decomposes to form black copper oxide . Two colourless gases are liberated. The gases are acidic sulphur dioxide and neutral oxygen.
CuSO­₄ . 5 H₂O  CuSO­₄ + 5 H₂O
2 CuSO­₄ ---- 2 CuO + 2 SO₂ + O₂
Note.
Students are expected to study following
1.thermal decomposition of ferrous sulphate (7H₂O) , sodium carbonate decahydrate , copper carbonate , Zinc carbonate .
Project: 3
Aim:
A comparative study of L.R and A.R grade Na₂CO_3.


Experiment:
To determine the percentage purity of L.R and A.R grade sodium carbonate.


Requirements:
Sodium carbonate, 1M HCl, Methyl orange.


Procedure:

1. 
   Weigh accurately 1.0 g of Na₂CO₃ and dissolve it in 25 cm³ of distilled water.
   
2. 
   Titrate the above solution with 1M HCl using methyl orange as an indicator.
   
3. 
   End point will be yellow to pink.
   
4. 
   Repeat the procedure to get constant burette reading
   

Observation:
Part –I: L.R grade sodium carbonate sample.
Constant Burette reading = ____________ (A) cm³
Part –II: A.R grade sodium carbonate sample.
Constant Burette reading = ____________ (B) cm³
Calculation:
Part –I:
1 cm³ of 1M HCl = 0.05299 g of Na₂CO₃
A cm³ of 1M HCl =

= ‘ X’ g of Na₂CO₃

% purity =

= ______________ % W/W
Part –II:
1 cm³ of 1M HCl = 0.05299 g of Na₂CO₃
B cm³ of 1M HCl =

= ‘ Y’ g of Na₂CO₃

% purity =

= ______________ % W/W
Result:


Project: 4