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One way to remove magnesium (Mg2+) from water is to precipitate it with a strong base...

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Chemistry

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

Answer & Explanation Solved by verified expert
3.6 Ratings (635 Votes)
MgSO4 Mg2 SO42 MgSO4 2NaOH MgOH2 Na2SO4 1 mole of MgSO4 requires 2 mole of NaOH MgSO4 Mg2 SO42 1 mole of MgSO4 is equal to 1 mole of Mg2 moles of Mg2 massMolecular    See Answer
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