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Topic: Galvanic cell reactions  (Read 4604 times)

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Offline angel_040

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Galvanic cell reactions
« on: June 15, 2007, 06:32:32 PM »
I did an experiment where I set up a galvanic cell. It consisted of two half cells, one with a (zinc) galvanised iron strip and iron nitrate and the other with a copper strip and copper nitrate. There was a potassium hydroxide salt bridge and the two electrodes where connected with a wire lead. After a day, I found that the galvanised iron strip had a layer of black all over it. I was just wondering what this black deposit could be and by what reaction was it formed? Initially I thought it was iron oxide however this is not black. I now think it might be something related to zinc.
Please reply soon!!! thanks

Offline constant thinker

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Re: Galvanic cell reactions
« Reply #1 on: June 16, 2007, 10:51:52 AM »
Iron does have a black oxide.

Iron (II) oxide

I'm by no means saying that your compound is ron (II) oxide.
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Offline pepe02ar

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Re: Galvanic cell reactions
« Reply #2 on: June 16, 2007, 01:57:47 PM »
It was Fe(NO3)2 or Fe(NO3)3 ? And the Copper Nitrate? It was CuNO3 or Cu(NO3)2 ?

Offline sayedosman

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Re: Galvanic cell reactions
« Reply #3 on: July 26, 2007, 01:47:30 PM »
the reactions in Galvanic cell
revesable Or irreversable?????

Offline sdekivit

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Re: Galvanic cell reactions
« Reply #4 on: July 26, 2007, 06:13:07 PM »
depends on the elektrode potentials of the oxidator and the reductor. if E < 0 the reaction is non-spontaneous.

Offline sayedosman

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Re: Galvanic cell reactions
« Reply #5 on: July 27, 2007, 04:51:41 AM »
Daniel cell:-primary or  secondary cell ??????
 Or Daniel cell can be recharge or no??            thanksssssssss

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