The electrochemical behavior of Cu(II)Cu(Hg)system in aqueous sucrose solutions was studied by polarography and cyclic squarewave voltammetry.The reversible halfwave potential and the diffusion coefficients for ...The electrochemical behavior of Cu(II)Cu(Hg)system in aqueous sucrose solutions was studied by polarography and cyclic squarewave voltammetry.The reversible halfwave potential and the diffusion coefficients for Cu(II) were polarographically determined.The standard Gibbs energies of transfer of Cu(II) from water to sucrosewater solutions,ΔGt,were obtained from the reversible halfwave potentials.The measured values are negative with increasing concentration of sucrose,indicating increasing stability of Cu(II) in sucrosewater solutions.The ΔGt values were split into electrostatic and chemical contributions.The decreased chemical contribution shows that the mixtures are more basic than pure water.展开更多
文摘The electrochemical behavior of Cu(II)Cu(Hg)system in aqueous sucrose solutions was studied by polarography and cyclic squarewave voltammetry.The reversible halfwave potential and the diffusion coefficients for Cu(II) were polarographically determined.The standard Gibbs energies of transfer of Cu(II) from water to sucrosewater solutions,ΔGt,were obtained from the reversible halfwave potentials.The measured values are negative with increasing concentration of sucrose,indicating increasing stability of Cu(II) in sucrosewater solutions.The ΔGt values were split into electrostatic and chemical contributions.The decreased chemical contribution shows that the mixtures are more basic than pure water.
