鹽酸溶液에서 白金(Ⅳ), 팔라듐(Ⅱ)과 로듐(Ⅲ)의 이온平衡
Ionic Equilibria of Pt(Ⅳ), Pd(Ⅱ) and Rh(Ⅲ) in Hydrochloric Acid Solution
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초록
염산농도 0.001에서 10 M사이의 범위에서 백금(Ⅳ)과 팔라듐(Ⅱ) 및 로듐(Ⅲ)의 착물형성반응과 물질수지를 고려하여 각 금속의 분배곡선을 구했다. 염산농도가 0.1 M이상인 조건에서는 백금과 팔라듐의 대부분은 와 로 존재하였다. 로듐의 농도분포는 염산농도에 큰 영향을 받는다. 염산농도가 0.1에서 10 M로 증가함에 따라 로듐의 주 화학종이 RhCl52에서 RhCl63로 변했다. 문헌에 발표된 백금과 팔라듐의 용매추출자료로부터 및 와 수소이온간의 매개변수를 추산했다
Abstract
Distribution diagram of Pt(Ⅳ), Pd(Ⅱ), and Rh(Ⅲ) in HCl solution was obtained as a function of HCl concentration from 0.001 to 10 M by considering complex formation reaction together with mass balance. When HCl concentration was higher than 0.1 M, most of Pt and Pd in HCl solution exist as and . The concentration of HCl had a great effect on the speciation of Rh(III). As HCl concentration increases from 0.1 to 10 M, the predominant species changes from RhCl52 to RhCl63. Interaction parameters of and with hydrogen ion were evaluated from the solvent extraction data of Pt and Pd reported in the literature
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