Submission of Proposal under Star College Scheme

QUALITATIVE ASPECTS IN INORGANIC PREPARATION

1) PRECIPITATION:

a) Precipitating agent:
to be added slowly with constant stirring Add the required quantity as given in procedure.
b)Maintenance of pH:
Proper pH should be maintained as given in the procedure to ensure complete precipitation.

3. 
   Technique:
   
4. 
   Use the proper amount of reagent. Precipitant should be added slowly with constant stiffing. Use sufficient amount of reagent in required quantity as given in the procedure,
   

2) DIGESTION:

1. 
   Use of water-bath:
   

Digest the ppt for a given time as mentioned in the chart. During digestion do not remove the glass rod.

2. 
   Completion of precipitation :
   

After digestion, check complete precipitation by adding some more precipitating agent
3) FILTRATION :
Technique :
Precipitate to be filtered through whatman paper using suction pump
4) WASHING :
a) Solvent for washing:
Depending on the solubility of the ppt. proper wash liquid should be used as given in the chart, water, is the preferred wash liquid for the precipitate provided precipitate Is Insoluble in water

5) DRYING:

Drying temperature
110°C to 130°C for ppt. which are formed from organic solvents. Dry for 20.30 mins,
6) COOLING
Use desiccators to dry the substance i.e to absorb the moisture, It contains anhydrous CaCl₂ Always keep the desiccators closed.
7) WEIGHING
Transfer the dried cooled product on the previously weighed watch-glass, to find the weight of the product.
QUALITATIVE ASPECTS IN ORGANIC EXPERIMENTS
1. PHYSICAL CONSTANT DETERMINATION :

1. 
   Melting point :
   

a) Boiling point:
2. RECRYSTALISATION TECHNIQUE:

1. 
   Choice of solvent :
   
2. 
   Procedure :
   

3. DRYING METHODS:
4. BULK SEPARATION: