¥ is the volume of water treated in cubic meters.

Mg(HCO3)2 ionizes to Mg(HCO3)2 ^ Mg2+ + 2HCO—; thus, the equivalent mass of magnesium bicarbonate is Mg(HCO3)2 /2. The magnesium bicarbonate not precipitated therefore produces:

rMTMgHCO3(1 - f MgHCO3)"

milligram equivalents of Mg2+ and HCO-, respectively.

Now, also recall that MMgCa (= /MgCa MT Mg) mass of magnesium from the noncarbonate hardness of magnesium precipitated. As before, let this mass be measured in kilograms. Also, let [Mg +]mgnot, in mg/L, be the concentration of magnesium not precipitated. Thus, rMg2+i - M™g ~ /MgCa^rMg LMg Imgnot - -—-

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