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diff --git a/2966/CH1/EX1.25/1_25.sce b/2966/CH1/EX1.25/1_25.sce
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+//water//
+//page 1.38 example 9//
+clc    
+Purity_Lime=.9
+Purity_soda=.9
+W1=19;//amount of MgCl2 in ppm//
+W2=27.2;//amount of CaSO4 in ppm//
+W3=4.9;//amount of H2SO4 in ppm//
+W4=6;//amount of AL3+ in ppm//
+M1=100/95;//multiplication factor of MgCl2//
+M2=100/136;//multiplication factor of CaSO4//
+M3=100/49;//multiplication factor of H2SO4//
+M4=100/18.0018;//multiplication factor of AL3+//
+P1=W1*M1;//in terms of CaCO3//L+S
+P2=W2*M2;//in terms of CaCO3//S
+P3=W3*M3;//in terms of CaCO3//L+S
+P4=W4*M4;//in terms of CaCO3//L+S
+V=500000;//volume of water in litres//
+L=0.74*(P1+P3+P4)*V/Purity_Lime;//lime required in mg//
+L=L/10^3;
+printf("\n Amount of Lime required is %.2f g",L);
+S=1.06*(P1+P2+P3+P4)*V/Purity_soda;//soda required in mg//
+S=S/10^3;
+printf("\n Amount of Soda required is %.f g",S)
+\ No newline at end of file