Silica concentrations ranging from 0 to 200 mg/L as SiO2.
Ka ≤1.90E+01
At pH > 7.25, bottles were covered with HDPE lids or poly(vinyl chloride) plastic wrap to minimize CO2 dissolution, but these steps did not completely eliminate it. Titration of control samples held at constant pHs indicated less than 5 × 10−5 M CO2 was dissolving into samples each hour, even at the highest pHs.