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+//ques-1.19
+//Calculating Total and Permanent and Temporary hardness
+clc
+V=50;//volume of water sample (in mL)
+v1=15.5;//total hardness volume (in mL)
+v2=12.5;//permanent hardness volume (in mL)
+v3=40.5;//standard hard water
+l=0.5;//lather factor (in mL)
+g=0.2;//mass of CaCO3 dissolved (in g/L)
+
+//1L SHW = 200mg CaCO3 eq
+//50mL SHW = 20mg CaCO3 eq = (40.5-0.5)mL Soap solution
+//1mL soap solution = 0.5mg CaCO3 eq
+
+total=(v1-l)*(1000/V)*0.5;//total hardness (in ppm)
+perm=(v2-l)*(1000/V)*0.5;//permanent hardness (in ppm)
+temp=total-perm;//temporary hardness (in ppm)
+printf("Total hardness of given sample is %d ppm , Permanent hardness is %d ppm and Temporary hardness is %d ppm.",total,perm,temp);