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//water and its treatment//
//example 2.18.49//
clc
volume_hardwater=10^4//in litres//
volume_NaCl=80//Volume of NaCl//
conc_NaCl=1000//mg NaCl consumed by zeolite bed per litre//
Wt_per_Litre=conc_NaCl/1000//gms NaCl consumed by zeolite bed per litre//
total_wt=Wt_per_Litre*volume_NaCl//total gms NaCl consumed by zeolite bed//
CaCO3_equivalent=total_wt*50/58.5//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("\nCaCO3 equivalent is %.f mg",CaCO3_equivalent*1000);
printf("\nHardness of water is %.2f mg/lit",Hardness);
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