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LECTURES ON GEOCHEMICAL !N1 ERPRETATION OF ...

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- 3 -100008000•"60004000200000 lOO 200 300 400Temperature, °cFIGURE 1. Values of Henry's Law constant, ~. for thesolution of carbon dioxide in water and sodium chloridesolutions. (Redrawn from RIlls and Gelding, 1963).Some dissolved carbon dioxide reacts with water (hydrates) to fo~carbonic ac id,(3)and some of the carbonic aeid. in turn , dissociates according to thereactions,+HCO l+ H I(4)[He031 [H+l[H2e03 1(5 )(6)(7)where square brackets indicate activities of the enclosed species, and KIand X 2are respectively the first and second dissoci ation constants of

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