Monday, 28 December 2020

Percentage Purity of HCl (Hydrochloric acid)

 



Process:

ð  Weigh 2 gm of the sample accurately in weighing bottle.

ð  Transfer the same sample in a 500 ml. volumetric flask.

ð  Made the solution up to 500 ml. with distilled water.

ð  Pipette out 10 ml. from the same solution using volumetric pipette and transfer it into a conical flask.

ð  Add 2 – 3 drops of phenolphthalein indicator.

ð  Titrate it against 0.1(1/10)N NaOH (sodium hydroxide).

    

     Chemical Reaction:

HCl(aq) + NaOH(aq) à NaCl(aq) + H2O(aq)

Calculation:

Answer: % Purity of HCl is (BR) X 9.12



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