Uptake of NO3 on KI solutions: Rate coefficient for the NO3+I- reaction and gas-phase diffusion coefficients for NO3

被引：46

作者：

Rudich, Y

Talukdar, RK

Imamura, T

Fox, RW

Ravishankara, AR

机构：

[1] UNIV COLORADO, COOPERAT INST RES ENVIRONM SCI, BOULDER, CO 80309 USA

[2] NATL INST ENVIRONM STUDIES, TSUKUBA, IBARAKI 305, JAPAN

[3] UNIV COLORADO, DEPT CHEM & BIOCHEM, BOULDER, CO 80303 USA

来源：

CHEMICAL PHYSICS LETTERS | 1996年 / 261卷 / 4-5期

关键词：

D O I：

10.1016/0009-2614(96)00980-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Uptake of NO3 by KI solutions was measured at 273+/-1 K using a wetted-wall flow tube to determine the rate coefficient for the NO3(aq)+I- reaction to be k=(4.6+/-0.5)x10(9) M(-1) s(-1). It is suggested that the reaction of NO3 with halide ions proceeds by electron transfer. Use of high concentration of KI enabled determination of the gas-phase diffusion coefficients of NO3 in H2O vapor, He, N-2 and O-2 to be, respectively, D-NO3-H2O=120+/-15, D-NO3-He=345+/-25 D-NO3-N2=80+/-15 and D-NO3-O2=80+/-15 Torr cm(2) s(-1). These coefficients agree well with calculated values.

引用

页码：467 / 473

页数：7

共 25 条

[1] RATE CONSTANTS FOR REACTIONS OF NO3. RADICALS WITH ORGANIC-COMPOUNDS IN WATER AND ACETONITRILE [J].