Limiting Conductivities of Strong Acids and Bases in D₂O and H₂O: Deuterium Isotope Effects on Proton Hopping over a Wide Temperature Range.

ABSTRACT: The molar conductivity (Λ°) of hydrochloric acid, potassium hydroxide, and sodium hydroxide has been measured in both light and heavy waters from 298 to 598 K at p = 20 MPa using a high-precision flow-through alternating current (AC) conductance instrument. The results were used to explore the deuterium isotope effect on ionic transport by proton hopping mechanisms under hydrothermal conditions. Extrapolations of published transport number data to elevated temperature were used to calculate the individual ionic contributions (λ°) for H₃O⁺, D₃O⁺, OH^-, and OD^-, from which the excess molar conductivities due to proton hopping were calculated. These are the first reported values for the excess conductivities for D_3</

SUBMITTER: Arcis H 

PROVIDER: S-EPMC9639610 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature