The Apparent Dissociation Constants of Carbonic Acid in Low Salinity Waters ...
The first and second apparent dissociation constants of carbonic acid in artificial seawater and diluted artificial seawater, K1 ' and K2 1 were determined at selected combinations of temperatures and salinities between 2 to 30° C and 0 to 35 o/oo with special attentions to waters with saliniti...
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| Format: | Text |
| Language: | unknown |
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Old Dominion University
1985
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| Online Access: | https://dx.doi.org/10.25777/e95y-v404 https://digitalcommons.odu.edu/oeas_etds/233/ |
| Summary: | The first and second apparent dissociation constants of carbonic acid in artificial seawater and diluted artificial seawater, K1 ' and K2 1 were determined at selected combinations of temperatures and salinities between 2 to 30° C and 0 to 35 o/oo with special attentions to waters with salinities below 20 o/oo at atmospheric pressure by measuring K1 ' and the product of K1 ' and K2. The results can be expressed as functions of temperature and salinity by the following equations, pK1 '=3360.206T-1 +0. 033331 T-14.8303-0.09633x (Cl1/2) pK2 '=14911.671 T-1 +0.1645549T-88.6081-0.28623x (Cl1/2) where pK1 ' and pK2' are the negative log of K1 ' and K2 ' respectively, Cl is chlorinity in o/oo, and T is temperature in °K. My value for pK1' at 35 o/oo and 25°C, a value that has been determined repeatedly by a number of investigators giving a range of 5.857 to 6.000 and an average of 5.954 ± 0.058, is 5.953. My value agrees well with theirs within analytical uncertainties. My results for pK1' at lower salinities are ... |
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