How to prepare & standardization 0.1 N Hydrochloric acid

0.1 N Hydrochloric acid (HCl) solution

0.1 N Hydrochloric Acid ( HCl ) 

 Preparation ) 0.1 N Hydrochloric Acid Solution                    

  • Take 8.3 ml of concentrated hydrochloric acid (Sp gr 1.19) into a 1000-ml volumetric flask.
  • Dilute to the mark with water, mix well, and 
  • Store in a tightly closed glass container.




I. Standardization  0.1 N Hydrochloric Acid with Sodium Carbonate  

  • Take 0.5 oto 1 g of primary standard anhydrouso sdium carbonate (Na2CO3) to a suitable dish or crucible, and dry at 250°C for 4 h. 
  • Cool in a desiccator.
  • Weight accurately 0.22 g of the dried Na2CO3, and transfer to a 250-mL conical flask. 
  • Add 50 mL of water, swirl to dissolve the carbonate, and add 2 drops of a 0.1 % solution of methyl red in alcohol.
  • Titrate with the HCl solution.

Initial point color     End point color   
0.1 N Hydrochloric Acid ( HCl ) solution0.1 N Hydrochloric Acid ( HCl ) solution



  Calculation                  


Normality of the Hcl solution(N), as
follows:
 N = A /0.053*B


Where
A – gram of Na2CO3 used,
B – used ml of Hcl solution in titrition.


Ex-
0.2203 gm of Na2CO3
41.7 ml used of Hcl solution.


Normality of the Hcl= 0.2203/0.053*41.7= 0.0997 N



 Stability                



Re-standardize monthly.




II. Standardization with Tris(Hydroxymethyl)- Amimethane 

  • Take 1 to 2 g of primary standard Tris (hydroxymethyl) Aminomethane [(HOCH2)3CNH2] to a suitable dish or crucible, and dry in a vacuum at 70°C for 24 h. 
  • Cool in a desiccator.
  • Weigh accurately 0.40 g of the dried tris(hydroxymethyl)aminomethane, and transferto a 250-ml conical flask. 
  • Dissolve in 50 ml of ammonia- and carbon dioxide-free water, and titrate with the HCl solution to a pH of 4.70 using a suitable pH meter.


  Calculation                


Normality of the Hcl solution(N), as
follows:
 N = A /0.1211*B
Where
A – gram of Tris(Hydroxymethyl)- Amimethane used,
B – used ml of Hcl solution in titrition.
Ex-
0.4002 gm of Tris(Hydroxymethyl)- Amimethane
33.1 ml used of Hcl solution.
Normality of the Hcl= 0.4002/0.1211*33.1= 0.0998N




  Stability                       



Re-standardize monthly.



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Author: Aman Kumar Sah

I am a professional blogger from India having rich experience in the Consumer Services Industry (Skilled in Textile & Leather) field.

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