Abstract
Abstract The activities of most of the major seawater components at 1,001 bars have been estimated, and values for the ions deduced. Equations giving the effect of pressure on the activities of ionic species in seawater ( S = 35‰ ) have been developed. The species covered are: NaSO4−, MgSO40, CaSO40, H+, the free base (NH3), the HCO3−/CO32 activity ratio and the ion activity product of calcium carbonate. Comparison of the latter with the “ideal” solubility of calcite (pure solid in equilibrium with a mixed electrolyte solution) indicates a degree of saturation compatible with the trends indicated by in situ measurements.
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