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cathode    音标拼音: [k'æθ,od]
n. 阴极

阴极

cathode
阴极

cathode
n 1: a negatively charged electrode that is the source of
electrons entering an electrical device [ant: {anode}]
2: the positively charged terminal of a voltaic cell or storage
battery that supplies current [ant: {anode}]


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  • Which is anode and which is cathode? - Chemistry Stack Exchange
    Designation of anode and cathode So labeling the anode and the cathode relies on an analogy between a voltaic cell and a photovoltaic cell as a source of electrical work It makes sense to use the direction of electron flow in the external circuit to define anode and cathode (electrons flow from anode to cathode in the external circuit)
  • Positive or Negative Anode Cathode in Electrolytic Galvanic Cell
    In a galvanic (voltaic) cell, the anode is considered negative and the cathode is considered positive This seems reasonable as the anode is the source of electrons and cathode is where the electrons flow However, in an electrolytic cell, the anode is taken to be positive while the cathode is now negative
  • Half cells: difference between E (cell) = E (cathode}-E (anode) E . . .
    The cathode is actually the reduction step, and the anode is the oxidation step A useful mnemonic I learned from my chemistry professor is a red cat and an ox Interestingly, cathodes in electrochemical cells are red and are positive So I have found many uses for this along the way
  • How are cathode rays produced? - Chemistry Stack Exchange
    Cathode rays are just a beam of electron observed in vaccum tube when the dicharge tube or evacuated glass tube is facilitated with 2 electrode and with high voltage, due to emmission of electron from and travelling in perpendicular to cathode,glass opposite of negative electrode(ie cathode) is observed to glow
  • Why do positive ions go to the cathode? - Chemistry Stack Exchange
    The cathode is a positive electrode in a galvanic cell There are different notations for the sign (±) of the cathode used in the literature, which are determined, in particular, by the nature of the process A very broad definition of a cathode is that it is the electrode of some device connected to the negative pole of the current source
  • Direction of flow of current in electrolytic cell [duplicate]
    So in both cases electrons flow from the anode to the cathode (This analysis is complicated by something I learnt in school as the technical current flow definition According to Bavarian textbooks, technicians defined current as flowing from plus to minus which is exactly the opposite of the flow of electrons
  • electrochemistry - Cathode + Anode - Chemistry Stack Exchange
    During discharge, the ions flow from the anode to the cathode through the electrolyte and separator; charge reverses the direction and the ions flow from the cathode to the anode On discharge, the anode undergoes oxidation, or loss of electrons, and the cathode sees a reduction, or a gain of electrons Charge reverses the movement
  • The effect of increasing concentration of a cathode solution on the . . .
    Overall, why does voltage increase when the concentration of the cathode solution increase? what does the redox reaction have to do with this? If it helps, the solution in Salt Bridge is 2 00 M Sodium Nitrate
  • physical chemistry - How to correctly define anode and cathode . . .
    The cathode is a negatively charged electrode where reduction takes place, and the anode is a positively charged electrode where oxidation takes place Let's analyse the second cell Without any additional information, I assume that no external power source is connected
  • Why is the anode in a galvanic cell negative, rather than positive . . .
    Similarly in diagrams comparing galvanic and electrolytic cells, electrons move away from the anode to the cathode in the electrolytic cell, making the anode positive This makes perfect sense according to my first reasoning However, in a galvanic cell, even though electrons still move from the anode to the cathode, it is defined as negative





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