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  3. a water with a ph =7.0 has been analyzed and found

A water with a pH =7.0 has been analyzed and found to have the following composition,...

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Civil Engineering

A water with a pH =7.0 has been analyzed and found tohave the following composition, with all concentration in mg/L asCaCO3:
CO2 = 125 mg/L
Ca2+ = 250 mg/L
Mg2+ = 80 mg/L
Fe2+ = 10 mg/L
Alkalinity = 260 mg/L
SO4 2- = 50 mg/L
Cl- = 30 mg/L
a) what is the hardness of this water? Report in mg/L asCaCO3
b) use the excess Lime soda Ash method and estimate the kilogramsof lime and kilograms of soda Ash that will be needed per 1MGD tosoften this water. Report assumptions used in the calculations.

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