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Find Acid value of vegetable oil whose 5 ml requires 2ml of N/100 KOH during titration. State whether the blend can still be useful for lubrication.
(density of oil is o.89)
Weight of oil = volume of oil in ml X density
= 5 X 0.92
= 4.60 gm
Acid value = Volume of KOH X N KOH X 56 /weight of oil
= 2 x 0.01 x 56 /4.60
= 0.243 mg of KOH /gm of oil
As acid value is more than 0.1 mg/gm oil is not suitable for lubrication
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