Ion Association and Hydration of Some Heavy-Metal Nitrate Salts in Aqueous Solution.

ABSTRACT: Aqueous solutions of four heavy-metal nitrate salts (AgNO₃, TlNO₃, Cd(NO₃)₂ and Pb(NO₃)₂) have been studied at 25 °C using broadband dielectric relaxation spectroscopy (DRS) at frequencies 0.27 ≤ ν/GHz ≤ 115 over the approximate concentration range 0.2 ≲ c/mol L^-1 ≲ 2.0 (0.08 ≲ c/mol L^-1 ≲ 0.4 for the less-soluble TlNO₃). The spectra for AgNO₃, TlNO₃, and Pb(NO₃)₂ were best described by assuming the presence of three relaxation processes. These consisted of one solute-related Debye mode centered at ∼2 GHz and two higher-frequency solvent-related modes: one an intense Cole-Cole mode centered at ∼18 GHz and the other a small-amplitude De

SUBMITTER: Hunger J 

PROVIDER: S-EPMC11492267 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature