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diff --git a/2966/CH3/EX3.3.28/3_3_28.sce b/2966/CH3/EX3.3.28/3_3_28.sce
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+++ b/2966/CH3/EX3.3.28/3_3_28.sce
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+//lubricants//
+//page 3.28 example 3//
+clc
+vol_oil=20//in ml//
+den_oil=0.86//density of oil in g/ml//
+wt_oil=vol_oil*den_oil//weight f oil saponified(gms)//
+volume=2.5//volume of alcoholic KOH consumed to neutralize fatty acids(ml)//
+normality_KOH=0.1//normality of KOH //
+A=volume*normality_KOH*56/wt_oil//formula for acid value//
+printf("\nAcid value of oil is %.3f mg/g",A);
+\ No newline at end of file