Thermodynamics of some bivalent metal chelates of sodium alizarin sulphonate |
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| Affiliation: | 1. Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada;2. Joint International Research Lab of Lignocellulosic Functional Materials and Provincial Key Lab of Pulp and Paper Sci & Tech. Nanjing Forestry University, Nanjing 210037, China |
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| Abstract: | The stepwise metal-ligand stability constants of alizarin red S with Ni(II), Co(II), Be(II) and UO2(II) have been determined at five different temperatures, viz. 10, 20, 30, 40 and 50°C, potentiometrically. The stepwise thermodynamic functions of these complex forming reactions like ΦG, ΔH and ΔS were also evaluated. The order of stability of bivalent metal chelates was found to be: UO2 > Be > Co > Ni. |
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