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+//water//
+//page 1.54 example 9//
+clc
+volume_hardwater=4500//in litres//
+volume_NaCl=30//Volume of NaCl in litres//
+Wt_per_Litre=100//% NaCl consumed by zeolite bed//
+total_wt=Wt_per_Litre*volume_NaCl//total gms NaCl consumed by zeolite bed//
+CaCO3_equivalent=total_wt*50/58.55//in terms of (gms/lit)//
+H=CaCO3_equivalent/volume_hardwater//Hardness of water(gms/lit)//
+Hardness=H*1000//Hardness of water(mg/lit) or ppm//
+printf("\nHardness of water sample is %.f ppm",Hardness);
+\ No newline at end of file