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diff --git a/2966/CH3/EX3.13/3_13.sce b/2966/CH3/EX3.13/3_13.sce
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+//lubricants//
+//page 3.34 example 3//
+clc
+S=180//Saponification value of oil//
+wt_oil=1//weight f oil saponified(gms)//
+blank=50//volume blank titration reading(ml)//
+normality_KOH=0.4//normality of KOH //
+volume=S*wt_oil/(normality_KOH*56)//formula for saponification value//
+back=blank-volume//volume of alcoholic KOH consumed(ml)//
+printf("\nQuantity of alcoholic KOH required per gram is %.0f ml",back);
+\ No newline at end of file