One way to remove magnesium (Mg2+) from water is toprecipitate it with a strong base such as sodium hydroxide (NaOH).Assuming the following unbalanced reaction describes theprocess. (a) Calculate the concentration of NaOH (in mg/L)needed to completely remove 20 mg/L ofMg2+.
(b) Calculate the mass (in lb) of solidMg(OH)2 that will be produced (and must be disposed of)if this reaction is performed in 250,000 gallons ofwater.
MgSO4 + NaOH = Mg(OH)2¯ +Na2SO4
