论文部分内容阅读
从理论上讲,氧化-还原反应是否能进行,取决于电动势ε=E_+-E-的大小。若ε>0,则反应能自发进行。E(电极电位)的大小又决定了氧化态物质的氧化能力和还原态物质的还原能力的强弱。一般说来,E值愈大,说明氧化态物质的氧化能力愈强,还原态物质的还原能力愈弱;E值愈小,说明还原态物质的还原能力愈强,氧化态物质的氧化能力愈弱。氧化态物质的E愈大,还原态物质的E愈小,对氧化-还原反应愈有利。氧化-还原反应如果是在溶液中发生的,且反应中又包括着H~+或O~H-(即H~+或OH~-参与了反应),那么,溶液的酸碱性
Theoretically, whether the oxidation-reduction reaction can proceed depends on the magnitude of the electromotive force ε=E_+-E-. If ε>0, the reaction can proceed spontaneously. The size of E (electrode potential) in turn determines the strength of the oxidation of the oxidized species and the ability to reduce the reduced species. In general, the larger the E value, the stronger the oxidizing ability of the oxidized substances, and the weaker the reducing ability of the reduced substances; the smaller the E value, the stronger the reducing ability of the reduced substances, and the more oxidized the oxidized substances. weak. The greater the E of the oxidized species, the smaller the E of the reduced species, the more favorable the oxidation-reduction reaction. If the oxidation-reduction reaction takes place in solution, and the reaction includes H~+ or O~H- (ie, H~+ or OH~~ participates in the reaction), then the acidity and alkalinity of the solution