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Having used a 10 mL sample -


Volatile Acidity (g/L as acetic) = Titre (mL) . x . Molarity of NaOH . x . 6 . (10 ml sample, 0.100 M NaOH)


VA = mL . x . . M . x . 6 . g/L


VA = g/L


Or

C = Molarity of aprox. 0.1 M NaOH = ............. M
V = Volume of .......... ml

Titre (ml) x C (M) x 60
Then Volatile Acidity (g/L) = -----------------------
. V (ml)