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diff --git a/2966/CH1/EX1.68/1_68.sce b/2966/CH1/EX1.68/1_68.sce
new file mode 100644
index 000000000..d9c9ba97e
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+//water//
+//page 1.89 example 1//
+clc
+W1=19;//MgCl2 in water in mg/L//
+W2=5;//CaCO3 in water in mg/L//
+W3=29.5;//Ca(HCO3)2 in water in mg/L//
+W4=13;//CaSO4 in water in mg/L//
+M1=100/95;//multiplication factor of MgCl2//
+M2=100/100;//multiplication factor of CaCO3//
+M3=100/162;//multiplication factor of Ca(HCO3)2//
+M4=100/136;//multiplication factor of CaSO4//
+P1=W1*M1;//MgCl2 in terms of CaCO3//
+P2=W2*M2;//CaCO3 in terms of CaCO3//
+P3=W3*M3;//Ca(HCO3)2  in terms of CaCO3//
+P4=W4*M4;//CaSO4  in terms of CaCO3//
+T=P2+P3;
+printf("\nTemporary hardness is %.2f ppm",T);
+P=P1+P4;
+printf("\nPermanant hardness is %.2f ppm",P);
+To=T+P;
+printf("\nTotal hardness is %.2f ppm",To);
+\ No newline at end of file