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diff --git a/1427/CH1/EX1.1/1_1.sce b/1427/CH1/EX1.1/1_1.sce
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+//ques-1.1
+//Calculating grams of Ferrous Sulphate required per litre
+clc
+hard=210.5;//hardness given (in ppm)
+m1=56;//Molar mass of Fe (in g)
+m2=32;//Molar mass of S (in g)
+m3=16;//Molar mass of O (in g)
+m4=40;//Molar mass of Ca (in g)
+m5=12;//Molar mass of C (in g)
+M1=m1+m2+4*m3;//Molar mass of Ferrous sulphate (in g)
+M2=m4+m5+3*m3;//Molar mass of Calcium carbonate (in g)
+//M2 ppm of hardness = M1 ppm of Ferrous sulphate
+amount=(M1/M2)*hard;//amount of Ferrous sulphate required (in ppm)
+printf("The amount of Ferrous sulphate required is %.5f g.",amount/1000);