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17 Nov 2019
The rate constants for the first-order decomposition of acetone dicarboxylic acid in aqueous solution were found to be 4.75 times 10^-4 s^-1 at 293 K and 5.48 times 10^-2 s^-1 at 333 K. Calculate (i) the Arrhenius parameters A and E_a, and (ii) the Eyring transition-state parameters Delta H and Delta S. (b) A small quantity of the alpha-particle emitting radioactive isotope^210 Po (t_1/2 = 138 days) was injected into the bloodstream of a patient, blood samples were then taken at intervals and counted with these results. Calculate the effective half-life and hence obtain the biological half-life (resulting only from the loss of^210 Po by excretion and absorption according to first-order kinetics) of^210 Po in the bloodstream. Determine the initial specific activity of^210 Po in the bloodstream at zero time and thereby also deduce the initial concentration of^210 expressed in atoms per ml.
The rate constants for the first-order decomposition of acetone dicarboxylic acid in aqueous solution were found to be 4.75 times 10^-4 s^-1 at 293 K and 5.48 times 10^-2 s^-1 at 333 K. Calculate (i) the Arrhenius parameters A and E_a, and (ii) the Eyring transition-state parameters Delta H and Delta S. (b) A small quantity of the alpha-particle emitting radioactive isotope^210 Po (t_1/2 = 138 days) was injected into the bloodstream of a patient, blood samples were then taken at intervals and counted with these results. Calculate the effective half-life and hence obtain the biological half-life (resulting only from the loss of^210 Po by excretion and absorption according to first-order kinetics) of^210 Po in the bloodstream. Determine the initial specific activity of^210 Po in the bloodstream at zero time and thereby also deduce the initial concentration of^210 expressed in atoms per ml.
Bunny GreenfelderLv2
1 Jul 2019