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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