Determines of purity of acrylic acid by titration method using 1(N) sodium hydroxide and Phenolphthalein indicator .
APPARATUS
a). 5ml stoppered weighing bottle.
b). 250 ml conical flask.
c). 100 ml measuring cylinder.
d). Burette.
REAGENTS:
a). Standard 1N sodium hydroxide (NaOH) solution.
b). Phenolphthalein indicator solution..
Procedure
Take an acrylic acid sample in a 5 ml stoppered weighing bottle. From this carefully transfer about 1 gm (weighing accurately) sample into a 250 ml conical flask.
Add about 100ml distilled water and shake well to mix properly.
Titrate this solution against standard 1(N) sodium hydroxide (NaOH) solution taken in a burette using a phenolphthalein indicator.
Assay (%) = Titre value (ml) x normality of NaOH x 7.206
Weight of acrylic acid sample taken (gm)