无机盐对pH振荡行为的影响  

Effects of inorganic salts on pH oscillating behaviors

作　　者：杨珊 侯玉龙[2] 

机构地区：[1]渭南师范学院化学与材料学院军民两用材料重点实验室,陕西渭南714099 [2]陕西师范大学材料科学与工程学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2017年第5期55-59,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金(2017JM2012);渭南市科技计划项目(2016KYJ-3-4);渭南师范学院科研计划项目(15YKF004);渭南师范学院特色学科建设项目(14TSXK04)

摘　　要：以BrO-3-SO2-3-Fe(CN)4-6(BSF)体系为pH振荡反应的模型体系,研究KCl、NH4Cl及AlCl3等典型无机盐的引入对pH振荡行为的影响。结果表明:pH振幅和周期皆随着引入无机盐的浓度的增加而线性减小;中性盐KCl对pH振荡行为的影响皆归因于原盐效应,弱酸盐NH4Cl对pH振荡行为的影响归因于原盐效应和酸性作用,而对pH振荡行为影响最为显著的弱酸盐AlCl3则还有一定的缓冲作用。研究显示,通过改变引入无机盐的种类和浓度可以不同程度地减小pH振荡的振幅和周期。The effects of three kinds of typical inorganic salts, i. e. , potassium chloride, ammonium chloride, and aluminum chloride, on the pH oscillating behaviors of BrO3^--SO3^2--Fe（CN）6^4-（BSF） system were investigated. The following results were obtained. The amplitude and period of pH for BSF system decreased linearly with the increase of inorganic salts. The effects of neutral salt KCl on the pH oscillating behaviors can be ascribed to primary salt effect, and the effects of weak acid salt NH4Cl can be ascribed to primary salt effect and acidic function, while the most remarkable effects of weak acid salt AlCl3 also possesses certain buffer effect. This research showed that, the amplitude and period of pH oscillation can be decreased more or less by introduction of different kinds and concentration of inorganic salts.

关 键 词：pH振荡 BSF体系 无机盐 原盐效应 

分 类 号：O657.1[理学—分析化学] O629[理学—化学]