Question

14. The equilibrium relaxation time (measured with a laser-induced pH-jump experiment) of a solution of 1 mM pyridine being protonated (below) at pH 8 is 191 ns. ki HN CHC-N CH HUNCHCN сн, COH Given that the pKof pyridine is 8.75, calculate k, and k..

Answer 1

1 13 ks 1990 ) К 2 ky à 3.914105 19lus KitK-1 a walt] -0.75 trall pollapkAt log Tract] base] 6-8.75 tog salt] Thase] Log Comedy -2.43 - {base] Ka [byridine - HAD Opyridine)Htj e -) Tisalt] tbare] Thusha =) ky 21.77881-3 s K 1.748X10-3 10-8 2 1.778 x 15 => K12 (1.778*10*5) K-1 -2191 (1.778X1095)k-, +K-) 1.198 X1061191

- 2191 k! (1.748X105) 4K-1 K-12 1914 (1.778X105+1) . 23.396X106 22.944*10851 k, 2(1.7788 105 ) K., 25-236x10 3 3 - 1