Physics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45.2085m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Issue 11, pp.2085-2089
Physics
3
Scientific paper
The stoichiometric, K HA * , and apparent, K ' HA , constants for the ionization of a number of weak acids (NH 4 + , HSO 4 - , HF, H 2 O, B(OH) 3 , H 2 CO 3 , HCO 3 - , H 3 PO 4 , H 2 PO 4 - , HPO 4 2 , H 3 AsO 4 H 2 AsO 4 - and HAsO 4 2- ) in seawater at 25°C diluted with water have been fitted to equations of the form ( , 1979). In K HA * = In K HA + AS 1/2 + BS where In K HA is the thermodynamic constant in water, S is the salinity, A and B are adjustable parameters. The validity of this equation in estuarine waters has been examined by using an ion pairing model ( and , 1981). The calculated values of K HA * and K ' HA at S = 35%. are in good agreement with the measured values for all the systems examined. The equation used to extrapolate the measured values to pure water K HA predicted values that agreed with those determined by using the ion pairing model. The exception was the ionization of HPO 4 2- due to the strong interactions of Ca 2+ and Mg 2+ with PO 4 3- . The differences in the predicted values of K HA * in seawater diluted with pure water and average river water were very small for all the acids except HPO 4 2- (the maximum pK = 0.96 in average river water). The larger difference in the K HA * for HPO 4 2- in river waters is due to the strong interactions of Ca 2+ and PO 4 3- .
No associations
LandOfFree
The ionization of acids in estuarine waters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The ionization of acids in estuarine waters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The ionization of acids in estuarine waters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-744188