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diff --git a/1478/CH2/EX2.18.18/2_18_18.sce b/1478/CH2/EX2.18.18/2_18_18.sce
new file mode 100755
index 000000000..094139fda
--- /dev/null
+++ b/1478/CH2/EX2.18.18/2_18_18.sce
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+//water and its treatment//
+//example 2.18.18//
+clc
+strength_SH=1//in terms of mgs/lit//
+volume_SH=50//in terms of ml//
+volume_H=50//in terms of ml//
+EDTA_SH=20//volume for Std hardwater(ml)//
+EDTA_H=25//volume for sample hardwater(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)//
+printf("\nTotal Hardness is %.f mg/l or ppm",To);
+\ No newline at end of file