Process:
ð Weigh
2 gm of the sample accurately in weighing bottle.
ð Transferred
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 transferred into
a conical flask.
ð Add
2 – 3 drops of phenolphthalein indicator.
ð Titrate it against 0.1(1/10)N HCl (Hydrochloric acid).
NaOH(aq) + HCl(aq) à NaCl(aq) + H2O(aq)
Calculation:
Answer: % Purity of NaOH is (BR)
X 10
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ReplyDeleteNaOH
Sodium hydrogen carbonate
Sodium carbonate
Natrium fluoride
NaHCO3
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