RATE CONSTANTS OF THE EQUILIBRIUM REACTIONS SO4-RADICAL-ANION-REVERSIBLE-ARROW-HSO4-+NO3. AND ADICAL-ANION+NO3-REVERSIBLE-ARROW-SO42-+NO3.(HNO3)

Rate constants of the following equilibrium reactions were determined by pulse radiolysis at high solute concentrations: SO4.- + HNO, half a rrow right over half arrow left HSO4- + NO3. [k(f) = (2.7 +/- 0.5) x 1 0(6) M-1 s-1, k(r) = (5.6 +/- 1.0) x 10(3) M-1 s-1] and SO4.- + NO3- h alf arrow right over half arrow left SO42- + NO3. [k(f) = (5.0 +/- 2.0 ) x 10(4) M-1 s-1, k(r) = (1.0 +/-0.2) x 10(5) M-1 s-1]. By extrapolat ion of the latter to zero ionic strength an approximate reduction pote ntial of NO3/NO3-, E0 = 2.45 +/- 0.05 V can be estimated.