Tuesday 15 May 2012

Prepare Molar Solution of Hydrochloric Acid

General Information:
One liter of this solution contains 36.461 g of hydrochloric acid (HCl).

 Procedure:
    Measure 95 ml of hydrochloric acid, and add water to make 1,000 ml.

Standardization: 
  Weigh accurately about 1.5 g of sodium carbonate (standard reagent), previously dried at about 270ˆ for 1 hour, dissolve it in 100 ml of water, and titrate with 1 mol/l hydrochloric acid (indicator: 2 drops of bromophenol blue TS). Near the end point, boil to expel carbon dioxide, and immediately continue the titration.

  1 ml of 1 mol/l hydrochloric acid = 52.99 mg of Na2CO3

0.5 mol/l Hydrochloric Acid
    Prepare and standardize as directed under 1 mol/l Hydrochloric Acid, using
47.5 ml of Hydrochloric Acid.

0.2 mol/l Hydrochloric Acid
    Dilute 1 mol/l hydrochloric acid with water to 5 times its original volume, or
prepare as directed under 1 mol/l Hydrochloric Acid, using 19 ml of hydrochloric
acid. Standardize as directed under 1 mol/l Hydrochloric Acid.

0.1 mol/l Hydrochloric Acid

    Dilute 1 mol/l hydrochloric acid with water to 10 times its original volume, or
prepare as directed under 1 mol/l Hydrochloric Acid, using 9.5 ml of hydrochloric
acid. Standardize as directed under 1 mol/l Hydrochloric Acid.

0.02 mol/l Hydrochloric Acid
    Dilute 0.1 mol/l hydrochloric acid with water to 5 times its original volume,
and standardize as directed under 1 mol/l Hydrochloric Acid.

0.01 mol/l Hydrochloric Acid

    Dilute 0.1 mol/l hydrochloric acid with water to 10 times its original volume,
and standardize as directed under 1 mol/l Hydrochloric Acid.

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