Determine quantity of lime and soda ash required to soften

Reference no: EM13310727

Determine the quantity of lime and soda ash required to soften 1 mgd of the following water. Plan to achieve a hardness of 40 mg/L as CaCO3. Note that an excess of 35 mg/L of lime (CaO) is required to achieve 40 mg/L as CaCO3. Assume a carbon dioxide concentration of 7.2 mg/L as CO2.

Cations mg/L Anions mg/L

Ca^+2 53.0 HCO3^-1 285.0

Mg^+2 12.1 SO4^-2 134.0

Na^+1 12.3 Cl^-1 73.5

Fe^+3 0 pH 8.1

Reference no: EM13310727

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