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Temperature dependence of Cu(II) carbonate complexation in natural seawater
Author(s) -
Soli Alan L.,
Byrne Robert H.
Publication year - 1989
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1989.34.1.0239
Subject(s) - seawater , carbonate , enthalpy , carbonate ion , chemistry , equilibrium constant , ion , inorganic chemistry , mineralogy , geology , thermodynamics , oceanography , organic chemistry , physics
Cu(II) carbonate complexation was examined in natural seawater between 5° and 35°C. The reaction enthalpy for the equilibrium Cu 2 + CO 3 2− ⇌ CuCO 3 0 , expressed in terms of total carbonate ion concentration, is ∼2.5 kcal mol −1 . The formation constant sw β 1 = [CuCO 3 0 ] [Cu 2+ ] −1 CO 3 2− ] T −1 , expressed in terms of total carbonate ion concentration in seawater, thus decreases by about 25% between 25° and 5°C.
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