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diff --git a/2966/CH1/EX1.55/1_55.sce b/2966/CH1/EX1.55/1_55.sce
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+//water//
+//page 1.85 example 4//
+clc
+conc_SH=15/1000//in terms of g/lit//
+strength_SH=conc_SH*1000//in terms of mgs/lit//
+volume_SH=20//in terms of ml//
+volume_H=100//in terms of ml//
+EDTA_SH=25//volume for Std hardwater(ml)//
+EDTA_H=18//volume for sample hardwater(ml)//
+AB_EDTA=12//volume required after boiling(ml)//
+CaCO3_equivalent_SH=strength_SH*volume_SH//in terms of CaCO3 equivalent//
+one_ml_EDTA=CaCO3_equivalent_SH/EDTA_SH//in terms of CaCO3 equivalent//
+To_sample=one_ml_EDTA*EDTA_H/volume_H//total hardness for given volume//
+To=To_sample*1000//total hardness per litre(ppm)//
+P_sample=AB_EDTA*one_ml_EDTA/volume_H//permanent hardness for given volume//
+P=P_sample*1000//permanent hardness per litre(ppm)//
+T=To-P
+printf("\nTotal Hardness is %.f ppm",To);
+printf("\nPermanent Hardness is %.f ppm",P);
+printf("\nTemporary Hardness is %.f ppm",T);
+\ No newline at end of file