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Topic: Electrolysis, Electrochemical series?  (Read 6290 times)

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Offline darkdark

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Electrolysis, Electrochemical series?
« on: November 09, 2007, 12:53:54 AM »
I would like to know the exact position of hydroxide ion in the electrochemical series of anions. I have two sources from the internet which contradicts each other. May I know which one of them is correct?

1. http://www.patana.ac.th/parents/curriculum/Chemistry/units/LR805.html

'Sulfate ions (SO4^2−)
Nitrate ions (NO3^−)
Carbonate ions (CO3^2−)
Hydroxide ions (OH−) from water (producing oxygen)
Chloride ions (Cl−)
Bromide ions (Br−)
Iodide ions (I−)'

2. http://books.google.com/books?id=ZCkKH4bUcPUC&pg=RA1-PA240&lpg=RA1-PA239&ots=XA_bs9tf2Z&dq=electrochemical+series+hydroxide&sig=uanEHd1R90ISI_4HwYbgmjJ4VmY#PRA1-PA239,M1

'NO3^-
SO4^2-
Cl-
Br-
I-
OH-'

From the first source, OH- is above the halogens wheras from the second source, OH- is below the halogens.
Is it below or above the halogens?
« Last Edit: November 09, 2007, 01:27:04 AM by darkdark »

Offline ARGOS++

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Re: Electrolysis, Electrochemical series?
« Reply #1 on: November 09, 2007, 11:52:33 AM »
Dear DarkDark,

Could this be of any help to you? The table is valid for 18° Celsius.
I found it by K-H. Näser: “Phys. Chemie” 
(fest = solid;  gasf. = gas)

Good Luck!
                    ARGOS++


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