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KMID : 1024520120210050555
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Journal of the Environmental Sciences
2012 Volume.21 No. 5 p.555 ~ p.562
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Experimental Determination of Equilibrium Constants of Copper Complexes in Aqueous Environment
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Cho Young-Il
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Abstract
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The experimental determination of equilibrium constants is required to estimate concentrations of reagents and/or
products in environmental chemical reactions. For an example, the choice of copper (Cu) complexation reactions was
motivated by their fast kinetics and the ease of measurement of Cu by an ion?sensitive electrode. Each individual titrant of
sulfate (SO42?) and oxalate (C2O42?) was expected to have its own unique characteristics, depending on the bonding in Cu?ligands connected to the aqueous species. The complexation reaction of Cu with SO42?somewhat fast reached equilibrium status compared with C2O42?.
The experimental equilibrium constants (Keq) of copper sulfate (CuSO4) and copper oxalate (CuC2O4) were determined 102.2 and 103~4.3, respectively.
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KEYWORD
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Equilibrium constants, Copper (Cu), Complexation reaction, Cu-ligands, Sulfate (SO42-), Oxalate (C2O42-)
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