Abstract
Solutions of HCO − 3 of concentrations similar to that of the Arabian Gulf water were heated for 5 h between 27.5 and 100°C under reflux and N 2 purging. These were then analyzed potentiometrically against standard HCl. Analysis of the titration curves revealed that the conversion of HCO − 3 into CO 2− 3 followed first order kinetics with an activation energy of 17.85 kcal/mol. Partial conversion of CO 2− 3 into OH − ions occurred when heating was carried out long enough at high temperatures. The implication of these findings on the general problem of alkaline scale formation from seawater is considered.
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