Preparation, Standardization and Estimation

  Ø   Apparatus:- ·          10 ml cylinder ·          Silica Crucible ·          Platinum Crucible   Ø   Reagents:- ·          Sulphuric Acid (AR Grade) ·          Nitric Acid (AR Grade) ·          Ammonium Molybdate 10% (w/v) Solution ·          Ammonium Nitrate (AR Grade)   Ø   Procedure:- Take approximately accurately 2 g sample in an accurately pre-weighted Silica Crucible. Then add sufficient amount Sulphuric Acid to wet the solution for digestion. Then digest very carefully in a fume hood. After complete digestion burn the crucible with sample at about 400°C in Muffle Furnace for about 2 hours. Then cool to room temperature. Then wash the residue throu...

  Ø   Apparatus:- ·          250 ml conical flask ·          100 ml cylinder ·          50 ml burette   Ø   Reagents:- ·          0.1 (N) Sodium Hydroxide ·          Phenolphthalein   Indicator ·          Potassium Hydrogen Phthalate (A.R Grade)   Ø   Preparation of Solution:- ·          0.1 (N) Sodium Hydroxide:-   Weight accurately 4 g Sodium Hydroxide and dissolve in 1L DM water. ·          Phenolphthalein Indicator:- Dissolve 0.1 g of Phenolphthalein Indicator in 20 ml methyl alcohol and add sufficient water to produce 100 ml.   Ø   Procedure:- Take accurately about 0.4 g Potassium Hy...

  Ø   Apparatus:- ·          250 ml conical flask ·          100 ml cylinder ·          50 ml burette ·          10 ml pipette Ø   Reagents:- ·          0.1 (N) Potassium Dichromate Solution ·          Barium Diphenylamine Sulfonate (BDS) Indicator   ·          Sulphuric Acid (A.R. Grade) ·          Phosphoric Acid (A.R. Grade) Ø   Preparation of Solution:- ·          0.1 (N) Potassium Dichromate Solution:-   Weight accurately 4.903 g Potassium Dichromate and dissolve in 1L DM water. ·          Barium Diphenylamine Sulfonate (BDS) I...