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diff --git a/2966/CH1/EX1.26/1_26.sce b/2966/CH1/EX1.26/1_26.sce
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+//water//
+//page 1.38 example 10//
+clc    
+Purity_Lime=.9
+Purity_soda=.95
+W1=81;//amount of Ca(HCO3)2 in ppm//
+W2=42;//amount of MgCO3 in ppm//
+W3=4.1;//amount of NaAlO2 in ppm//
+W4=3.65;//amount of HCl in ppm//
+W5=82;//amount of Ca(NO3)2 in ppm//
+M1=100/162;//multiplication factor of Ca(HCO3)2//
+M2=100/84;//multiplication factor of MgCO3//
+M3=100/82;//multiplication factor of NaAlO2//
+M4=100/36.5;//multiplication factor of HCl//
+M5=100/164;//multiplication factor of Ca(NO3)2//
+P1=W1*M1;//in terms of CaCO3//L
+P2=W2*M2;//in terms of CaCO3//2*L
+P3=W3*M3;//in terms of CaCO3//-L
+P4=W4*M4;//in terms of CaCO3//L+S
+P5=W5*M5;//in terms of CaCO3//S
+printf ("We do not take NaCl since it does not react with lime/soda");
+V=20000;//volume of water in litres//
+L=0.74*(P1+2*P2+P4-P3)*V/Purity_Lime;//lime required in mg//
+L=L/10^3;
+printf("\n Amount of Lime required is %.2f g",L);
+S=1.06*(P4+P5)*V/Purity_soda;//soda required in mg//
+S=S/10^3;
+printf("\n Amount of Soda required is %.3f g",S)
+\ No newline at end of file