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November 01, 2025, 01:07:02 pm
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Author Topic: galvanic cells and electrolysis  (Read 840 times)  Share 

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lisafaustina

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galvanic cells and electrolysis
« on: September 10, 2010, 04:45:43 pm »
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 if the anode is placed higher than the cathode in the electrochemical series, does a reaction still occur?
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cypriottiger

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Re: galvanic cells and electrolysis
« Reply #1 on: September 10, 2010, 05:31:37 pm »
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in a regular reaction. no, as a positive gradient occurs (the actual scientific reason why i have forgotten :S)
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kenhung123

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Re: galvanic cells and electrolysis
« Reply #2 on: September 10, 2010, 06:53:19 pm »
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In electrolysis yes.
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andy456

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Re: galvanic cells and electrolysis
« Reply #3 on: September 10, 2010, 10:58:53 pm »
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It only occurs with the imput of electrical energy; that is it will happen, just not spontaneously (I think)
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Richiie

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Re: galvanic cells and electrolysis
« Reply #4 on: September 10, 2010, 11:09:41 pm »
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Quote from: cypriottiger on September 10, 2010, 05:31:37 pm
in a regular reaction. no, as a positive gradient occurs (the actual scientific reason why i have forgotten :S)


Using this method isn't really helpful. Just, the electrons donated from the reductant wouldn't want to go to an oxidant which has a lower e naught value.
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sajib_mostofa

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Re: galvanic cells and electrolysis
« Reply #5 on: September 11, 2010, 08:55:34 pm »
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Just a quick note, you have to be aware that even if the cathode is higher than the anode and the reaction occurs in theory, practically it may not occur due to requirements such as catalyst or certain temperature, which the electrochemical series does not take into consideration.
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