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diff --git a/1478/CH3/EX3.7.15/3_7_15.sce b/1478/CH3/EX3.7.15/3_7_15.sce
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+++ b/1478/CH3/EX3.7.15/3_7_15.sce
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+//lubricants//
+//example 3.7.15//
+clc
+volume_oil=20//volume of oil titrated(ml)//
+density_oil=0.86//density of oil titrated//
+wt_oil=volume_oil*density_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 mgs KOH",A);
+\ No newline at end of file