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Topic: electrolysis  (Read 5151 times)

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Offline Saionji

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electrolysis
« on: September 04, 2010, 06:30:04 PM »
For electrolysis to be successful, the source of energy can not use power directly from a power plant. The corrent must pass through a rectifier. The rectifier let the corrent constant, but why this is necessary? I thought that if the corrent grows very rapidly for example, the processes of oxidation and reduction will not be 100%, the productivity will be less, but I do not know explain it well.
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Offline Borek

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Re: electrolysis
« Reply #1 on: September 05, 2010, 03:58:12 AM »
Rectifier converts AC to DC, that's the most important part here.
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Offline Saionji

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Re: electrolysis
« Reply #2 on: September 05, 2010, 11:30:17 AM »
CA - is for long distances, the direction of the electrons changes, the voltage is changing
CC - is for short distances, the direction of the electrons does not change, the voltage is constant
Can I say anything more?
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Offline Borek

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Re: electrolysis
« Reply #3 on: September 05, 2010, 12:17:35 PM »
What are characteristic parameters of the redox reaction going on any electrode?
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Offline Saionji

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Re: electrolysis
« Reply #4 on: September 05, 2010, 01:39:09 PM »
What would be characteristic parameters?
There is a cathode and an anode. The electrons leave the anode to the cathode. The electrode of the anode corrode. The cathode gets electrons and is reduced; anode loses electrons and oxidizes. The eletric corrent continues to exist until the anode corrode in large quantities.
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Offline Borek

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Re: electrolysis
« Reply #5 on: September 05, 2010, 02:52:48 PM »
Have you ever heard word "potential"?
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Offline Saionji

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Re: electrolysis
« Reply #6 on: September 05, 2010, 02:57:55 PM »
 :'( Yes... potential of reduction or oxidation? The eletric corrent will exist until the difference of potencial be 0...
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Offline Borek

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Re: electrolysis
« Reply #7 on: September 11, 2010, 04:08:36 PM »
We are no talking about potential in the galvanic cell, but during electrolysis.
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Offline Saionji

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Re: electrolysis
« Reply #8 on: September 11, 2010, 10:25:22 PM »
Hmm... but the potential in the electrolysis is due the potential in the galvanic cell, i thought so... then I believe do have not "heard word potential".
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Offline Borek

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Re: electrolysis
« Reply #9 on: September 12, 2010, 03:25:48 AM »
During electrolysis potential is forced upon the cell and reactions that take place depend on the potential applied. If you apply correct potential you will observe electrode reactions occurring. Think how potential changes when using AC.
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Offline Saionji

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Re: electrolysis
« Reply #10 on: September 12, 2010, 05:51:29 PM »
The potential will be varying, it will not stay constant i believe, because the movement of electrons does not have a fixed direction.
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Offline Saionji

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Re: electrolysis
« Reply #11 on: September 14, 2010, 08:19:09 PM »
Ah, then if the potencial is not constant it can be less than the necessary to sustain the reaction and it stops. Is it?
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