In an electrochemical cell, the anode is

Question

BlackTom AI · Accepted Answer

In electrochemistry, the role of the anode is tied to oxidation processes during cell operation. 
Option 1: 'always used up before the cathode.' This is a misconception: electrodes are not described by being exhausted in this way; all that happens is electrons are transferred through the external circuit and ions interact; depending on the cell type, the anode may undergo oxidation continuously, but saying it is always used up before the cathode confuses function with durability. 
Option 2: 'never a metal.' The anode can be a metal or a nonmetal material; there is no universal rule that anode cannot be a metal. The key criterion is oxidation at that electrode, not the elemental identity of the electrode material. 
Option 3: 'the electrode at which oxidation takes place.' This aligns with the standard definition: oxidation occurs at the anode, and electrons are released into the external circuit. This description matches the fundamental half-reaction concept where oxidation is defined at the anode. 
Option 4: 'the material used to connect the two half-cells to each other.' That describes the external conductive path or salt bridge/electrode connections, not the identity or function of the anode itself. The anode is not the connector material but the site of oxidation. 
Overall, the statements contrast: only the third option correctly identifies the anode as the site of oxidation, while the others mix up function with durability, material identity, or the purpose of the connecting medium.

In an electrochemical cell, the anode is单项选择题

类似问题

The purpose of the salt bridge in a galvanic cell is to:

When potassium hydroxide is combined with _______, the chemical reaction promotes current flow in the presence of an applied voltage.

A galvanic cell is constructed from the Sn4+/Sn2+ and Zn2+/Zn half cells. With reference to the Standard Reduction Potential Table the formula sheet, which of the following statements is correct about this cell?

In a fuel cell,

What is the true about concentration cell?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单