Answer in Brief
9ml of oil is taken from machine and it requires 1.5ml of 0.04 N KOH. Find acid value( density= 0.81 g/ml)
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Solution
Given data: volume of oil = 9ml
Volume of KOH = 1.5ml
Normality of KOH = 0.04N
To find: Acid value
Formula: Acid value ` =("Volume of KHO "xx "Normality of KOH" xx 56 )/("Weight of oil") ` mg/gm
Solution: Acid value = `(1.5 xx 0.04 xx 56)/9` mg/gm
= 0.373 mg/gm
Acid value of the oil is 0.373 mg/gm.
Concept: Definition and significance of - Viscosity
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