Electricity 1 Flashcards

1
Q

简单叙述电化学分析法分类

A

三类。第一类–无双电层,无电极反应;第二类–有双电层,无电极反应;第三类–有电极反应。

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2
Q

无液体接界电池(有液体接界电池)

A

两电极浸在同一电解质溶液(不同电解质溶液)中

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3
Q

电池表示方法

A

阳极在左;E=右-左+(液接电位)

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4
Q

什么是液体接界电位

A

不同溶液接触时相界面上存在微小电位差

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5
Q

液体接界电位产生原因

A

经相界面时不同溶液的扩散速度不同

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6
Q

什么是电极的极化

A

电流通过电极时,电极电位偏离能斯特平衡电位的现象

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7
Q

简述电极极化分类

A

依据产生原因不同分为两类:浓差极化;电化学极化

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8
Q

什么是浓差极化

A

由于电极附近的浓度与主体浓度差别

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9
Q

什么是电化学极化

A

由于电极反应的速度较慢

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10
Q

什么是超电位(过电位)

A

实际电位与平衡电位的差值

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11
Q

超电位对阴阳极的影响

A

阳极电位更正,阴极电位更负

注意:电解池、原电池正负极与阴阳极的对应关系

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12
Q

影响超电位的因素

A

温度越高,超电位越小;
电流密度越大,超电位越大;
产物为气体是超电位一般较大。
电极化学成分不同,超电位不同。

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