The percentage purity of glacial acetic acid by the titrate method with sample solution against standard 1(N) sodium hydroxide (NaOH) solution.
APPARATUS
a). 5 ml Stoppered weighing bottle.
b). 250 ml conical flask.
c). 100 ml measuring cylinder.
d). Burette.
REAGENTS
a). Standard 1(N) sodium hydroxide solution.
b). Phenolphthalein indicator solution.
ASSAY PROCEDURE OF ACETIC ACID
Take an acetic acid sample in a 5 ml stoppered weighing bottle. From this carefully transfer about 1 gm(accurately weighed) sample into a 250-ml conical flask.
Add about 50 ml distilled water and shake well to ensure thorough mixing.
Titrate this sample solution against standard 1(N) sodium hydroxide (NaOH) solution taken in a burette using phenolphthalein as an indicator.
Assay (%)= Titre value (ml) x Normality of NaOH solution x 6.005/Wt.