A Ground water was anaylzed as follows; Co2= 30 mg/L as CaCO3
Ca2+= 180 mg/L as CaCO3
Mg+2= 120 mg/L as CaCO3
Na+= 80 mg/L as CaCO3
Alkalinity = 360 mg/L as CaCO3
SO42- = 10 mg/L as CaCO3
Cl- = 10 mg/L as CaCO3
pH = 7.2
Would softening be recommended for this water? Determine the following quantities (as mg/L of CaCO3): Total hardness, calcium hardness (both carbonate hardness [CH] and non-carbonate hardness[NCH]), and magnesium hardness (both CH and NCH)

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater