用惰性电极电解50ml锰酸钾溶液：K2MnO4+H2O KMnO4 +H2↑+ KOH（未配平）当

用惰性电极电解50ml锰酸钾溶液：K₂MnO₄+H₂O KMnO₄ +H₂↑+ KOH（未配平）当生成112ml氢气（标准状况）时停止通电。下列判断正确的是（）

A．K⁺浓度减小 B．KMnO₄在阳极区生成

C．阴极周围溶液的pH值减小 D．反应过程中共转移0.005mol电子

答案

相关题目

Surfing the Internet for fun will make you a better employee，according to an A

Surfing the Internet for fun will make you a better employee，according to an Australian study． The University of Melbourne study shows that people who use the Internet for their own reasons at w

. ——Does your father plan to attend the conference? ——Yes, he intends___

. ——Does your father plan to attend the conference? ——Yes, he intends______. A. so B. to do it C to do D. to

____ is known to me is that Jack has broken his promise _____he would buy me

____ is known to me is that Jack has broken his promise _____he would buy me a laptop for my birthday. A. What; that B. It; which C. What; which D

近年来,收入分配体制改革备受关注。收入分配体制改革虽然

近年来,收入分配体制改革备受关注。收入分配体制改革虽然涉及方方面面的问题,但其重心是初次分配领域。下列选项中,居民收入属于这一分配领域的

“Hey, Dad, are you going to come to my award ceremony tonight?” I 36 �

“Hey, Dad, are you going to come to my award ceremony tonight?” I 36 asked my father. “I have to work late tonight. I doubt I’ll be able to 37 it on time. I am just too busy r

将状况相同的某种绿叶分成四等组，在不同的温度下分别暗

将状况相同的某种绿叶分成四等组，在不同的温度下分别暗处理1 h，再光照1 h(光照强度相同)，测其重量变化，得到如下表的数据。组别一二三四温

Don’t be discouraged. Take things they are and you will enjoy ev

Don’t be discouraged. Take things they are and you will enjoy every day of your life. A. where B. as C. when �

夏天的清晨，沅江河面上常会出现一层薄雾，这一现象的出

夏天的清晨，沅江河面上常会出现一层薄雾，这一现象的出现是由于:A．河水经过蒸发形成的水蒸气; B．河水先蒸发后液化;C．河水先蒸发后凝固; �

用惰性电极电解50ml锰酸钾溶液：K2MnO4+H2O KMnO4 +H2↑+ KOH（未配平）当

答案

相关题目

最新题目