Electrolysis, electrochemical deposition...

Thread Starter

Externet

Joined Nov 29, 2005
2,216
Hi all.
If a solution has many different chemicals, ions, minerals, metals in it, and 0.1Volt is applied to its immersed electrodes, can be predicted what deposits will coat the anode/cathode by the amount of voltage ? What differs if the voltage is 1.5V instead ? Or 5V ? Is there a table that tells it ?
 

LowQCab

Joined Nov 6, 2012
4,052
Hi all.
If a solution has many different chemicals, ions, minerals, metals in it, and 0.1Volt is applied to its immersed electrodes, can be predicted what deposits will coat the anode/cathode by the amount of voltage ? What differs if the voltage is 1.5V instead ? Or 5V ? Is there a table that tells it ?
.
No ........
The Ions must be isolated FIRST, Voltage differences will not "separate" them.
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MrSalts

Joined Apr 2, 2020
2,767
The reduction potential of each ion is known and any ion that can be reduced at a potential below the applied voltage will get plated out.

you can look up each item in the mixture and stepwise plate them out to isolate each one in the mixture.
Look up a table of "standard reduction potentials". Note that your voltage will vary slightly because those listed reduction potentials are from a "standard hydrogen electrode".

https://en.m.wikipedia.org/wiki/Sta..._page)#Table_of_standard_electrode_potentials
 
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