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Find the acid-value of vegetable oil whose 5ml required 2ml of N/10 KOH during titration (Density of oil = 0.92).
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Given:

Volume of oil=5ml,

Volume of KOH=2ml,

Density of oil=0.92,

Normality of KOH=0.01N.

 

To find: Acid value

To find the weight of oil,

density=massvolume  or mass=density×volume

weight of the oil=0.92×5

                          =4.60

Acid value=volumeofKOH×normalityofKOH×56weightofoil

Hence acid value=2×0.01×564.60

 acid value=0.243 mg …

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