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Effect of Composition on the pH and Solution Potential of Mixed Solutions of Copper and Iron Chloride  

Lee, Man-Seung (Department of Advanced Materials Science & Engineering, Mokpo National University)
Son, Seong-Ho (Korea Institute of Industrial Technology, Incheon Technology Service Division)
Publication Information
Resources Recycling / v.17, no.6, 2008 , pp. 17-23 More about this Journal
Abstract
In order to simulate the leaching solution of copper sulfide ore in $FeCl_3$ solutions, synthetic solutions with composition of $FeCl_3$-$FeCl_2$-$CuCl_2$-CuCl-NaCl-HCl-$H_2O$ were prepared. The concentration of iron and copper chloride was varied from 0.1 to 1 m in synthetic solutions. The effect of composition on the mixed solution pH and potential at $25^{\circ}C$ was measured. When HCl concentration was constant, the increase of CuCl concentration increased solution pH. The increase of other solutes excluding HCl and CuCl decreased solution pH owing to the increase of the activity coefficient of hydrogen ion. A high CuCl concentration favored the redox equilibrium in the direction of Cu(I), while $FeCl_3$ had the opposite effect.
Keywords
Iron chloride(II, III); copper chloride(I, II); pH; potential;
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Times Cited By KSCI : 1  (Citation Analysis)
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