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Preparation and Standardization of 0.1 M Hydrochloric acid (HCl)

Preparation and standardisation of 0.1 M Hydrochloric acid (HCl) using THAM (Tris (hydroxymethyl)-amino methane and Bromocresol Green indicator.
2018-05-30T05:16:04Z PrintOnline CoursesQuestion Forum 1 comment
✔ Technical Review by: | Last Verified:2018-05-30T05:16:04Z

Hydrochloric acid Solution Preparation

  • Take about 100 ml of water in a cleaned and dried 1000 ml volumetric flask.
  • Add about 8.5 ml of Conc. Hydrochloric acid with continuous stirring. 
  • Add more about 700 ml of water, mix and allow to cool to room temperature. 
  • Make up the volume 1000 ml with water. Mix solution thoroughly. 
  • Keep the solution for at least one hour and then carry out the standardization.
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Hydrochloric acid Solution Standardization

  • Accurately weigh about 0.5 g of THAM (Tris (hydroxymethyl)-amino methane (tromethamine), previously dried at 105° for 3 hours and cooled in a desiccator, transfer to a conical flask.
  • Dissolve in 50 ml of distilled water.
  • Add 2 drops of Bromocresol Green indicator.
  • Titrate with 0.1M Hydrochloric acid to a pale yellow endpoint.
  • Each 121.14 mg of tromethamine is equivalent to 1 ml of 0.1M hydrochloric acid.
  • Calculate the molarity by the following formula:
           THAM in mg
M = ---------------------
        121.14 x HCl in ml




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1 comment: Post Yours! Read Comment Policy ▼

  1. AUNG KOE23 May

    Let me know reference for this procedure

    ReplyDelete

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