Transcription of 10 CHEMISTRY OF CARBONIC ACID EQUILIBRIA IN WATER
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10 CHEMISTRY OF CARBONIC ACID EQUILIBRIA IN WATER
9 CHEMISTRY OF CARBONIC ACID IN WATER INTRODUCTION Studying the carbon isotopic composition of WATER , whether it concerns freshwater or seawater, a complication arises from the fact that the dissolved inorganic carbon always consists of more than one compound, while also the presence of gaseous CO2 and solid calcium carbonate may be relevant. In fact we are dealing with the following compounds and concentrations : gaseous CO2 (occasionally denoted by CO2g) with a partial pressure PCO2 dissolved CO2 (denoted by CO2aq) dissolved CARBONIC acid, H2CO3 with a = [H2CO3] + [CO2aq] dissolved bicarbonate, HCO3 with b = [HCO3 ] dissolved carbonate, CO32 with c = [CO32 ] total dissolved inorganic carbon, DIC, with CT = a + b + c sol
groundwater, for 13C as well as 14C (Figs.7.7 and 8.4). In other words: an isotopic ... For the essential translation of 13 of total dissolved carbon to 13 of single compounds, and conversely, the inorganic carbon chemistry, i.e. of the dissolved inorganic carbon is required. ... solutions where the metal-ion concentrations (Na, Ca, Mg) and pH ...
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