ClO2是一种消毒杀菌效率高、二次污染小的水处理剂。实验室可通过

ClO2是一种消毒杀菌效率高、二次污染小的水处理剂。实验室可通过以下反应制得ClO2

2KClO3+H2C2O4+H2SO2ClO2↑+K2SO4+2CO2↑+2H2O

下列说法正确的是(    )

A.KClO3在反应中失去电子

B.ClO2是氧化产物

C.H2C2O4在反应中被氧化

D.1 mol KClO3参加反应有2 mol电子转移

答案

解析:本题以氧化还原反应为命题背景,考查考生将书本知识与题给信息相联系的灵活运用知识的能力。由所给反应可知,KClO3中氯元素化合价从+5降低为+4,每摩尔KClO3得到1 mol电子,而被还原成为ClO2,H2C2O4中碳元素化合价从+3升高到+4,H2C2O4作还原剂被氧化。

答案:C

相关题目

如图所示,将正方形纸片三次对折后,沿图中AB线剪掉一个等
如图所示,将正方形纸片三次对折后,沿图中AB线剪掉一个等腰直角三角形,展开铺平得到的图形是( ) A.    B.    C.    D.
       Learn to relax. Overwork is the main reason why so many students f
       Learn to relax. Overwork is the main reason why so many students feel tired and stressed(紧张). Cut down some of the jobs you need to do each day so that you can only focus on the mo
In recent years, especially during the 1960s, there was much discussion about
In recent years, especially during the 1960s, there was much discussion about “the brain drain(排干,流失),” which dealt with the problem of students and learned people who left their o
天安门城楼的焰火未平息,一曲优美而“另类”的《国家》
天安门城楼的焰火未平息,一曲优美而“另类”的《国家》余间未消——“一 玉口中国,一瓦顶成家,都说国很大,其实一个家;一心装满国,一手撑起
A、B、C、D是短周期元素形成的四种气体单质,甲、乙、丙、
A、B、C、D是短周期元素形成的四种气体单质,甲、乙、丙、丁是化合物,其中化合物乙是离子晶体,D元素的原子最外层电子数是次外层的3倍,C的氧化
如图,在三棱柱ABC﹣A1B1C1中,侧面ABB1A1, ACC1A1均为正方形,A
如图,在三棱柱ABC﹣A1B1C1中,侧面ABB1A1, ACC1A1均为正方形,AB=AC=1,∠BAC=90°,点D 是棱B1C1的中点. (1)求证:A1D⊥平面BB1C1C; (2)求证:AB1∥平面A1D
有下列物理量:(1)质量,(2)速度,(3)位移,(4)力,(5)加速度,(6)路程,(
有下列物理量:(1)质量,(2)速度,(3)位移,(4)力,(5)加速度,(6)路程,(7)密度,(8)功.其中不能称为向量的有____________个(    )A.1个              B.2个   
 – I’m getting fatter and fatter. – I think you need to _____ and take m
 – I’m getting fatter and fatter. – I think you need to _____ and take more _____.        A. have healthy diet; exercises             B. on diet; exercising        C.

最新题目