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diff --git a/2465/CH17/EX17.9/Example_9.sce b/2465/CH17/EX17.9/Example_9.sce
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+//Chapter-17,Example 9,Page 372
+clc();
+close();
+
+m1 = 146    //mass of Mg(HCO3)2
+
+m2 = 162    //mass of Ca(HCO3)2
+
+m3 = 111    //mass of CaCl2
+
+m4 = 120    //mass of MgSO4
+
+m5 = 136    //mass of CaSO4
+
+amnt_1 = 12.5     //amount of Mg(HCO3)2 in ppm
+
+amnt_2 = 10.5     //amount of Ca(HCO3)2 in ppm
+
+amnt_3 = 8.2     //amount of CaCl2 in ppm 
+
+amnt_4 = 2.6     //amount of MgSO4 in ppm
+
+amnt_5 = 7.5     //amount of CaSO4 in ppm
+
+temp_hard= [(amnt_1*100/m1)+(amnt_2*100/m2)]*0.1
+
+perm_hard= [(amnt_3*100/m3)+(amnt_4*100/m4)+(amnt_5*100/m5)]*0.1
+
+printf("the temporary hardness is = %.4f degree Fr",temp_hard)
+
+printf("\n the permanent hardness is = %.4f degree Fr",perm_hard)