Studies on the Polarographic Kinetic Currents for the First Order Reactions at the Droping Mercury Electrode

水銀滴下電極에서 一次反應에 對한 포라로그라프電流에 關한 硏究

  • Kim, Hwang-Am (Dept. of Chemistry, College of Liberal Arts and Science, Sung Kyun University) ;
  • Chin, Chang-Hee (Dept. of Chemistry, College of Liberal Arts and Science, Sung Kyun University)
  • 김황암 (成均館大學校 文理科大學 化學科) ;
  • 태창희 (成均館大學校 文理科大學 化學科)
  • Published : 19620200

Abstract

Solution to the diffusion layer for the first order reaction at a droping mercury electrode (D.M.E.) is presented. Equations are derived for polarographic currents for the reactions at the D.M.E. A factor which is applicable to the D.M.E. is derived, when we use the equations of the polarographic currents for the reactions at a plane electrode(P.E.), and the rate constants of the backward reactions are negligibly small. Polarographic currents from a combination of diffusions and reactions are obtained at the D.M.E. with special approximation. Rate constant for the reaction of ferrous ion with hydrogen-peroxide is determined at the D.M.E.,using the data of Kolthoff and Perry. The agreement of the equation with the data of Kolthoff and Perry for the kinetic current of ferric ion in the presence of hydrogen-peroxide is good. Ratios of diffusion layer at the D.M.E. to the diffusion layer at the P.E. are discussed and show that, when the rate constants of the backward reactions for the first order reactions are larger than 1/0.05 sec-1. and drop-time about 3 sec., these ratioes are about one.

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References

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