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mekanochemical
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Quote: Originally posted by wg48temp9  | | Quote: Originally posted by mekanochemical | A little question about the cell running
Here the table salt came with a small amount of potassium iodide (around 40mg per kg), is it harmful to reaction or to electrodes?
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Its better to use dishwasher salt. Its much cheaper than than table salt and has no added spurious ingredients. |
here is the opposite. The table salt costs around 0,75 US$ per kg, and the "industrial salt" without iodine costs around 1,25 (and came in 25kg bag)
Hue Hue Hue
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Rainwater
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At lowes
Water softener salt is about 7uds for 40 pounds (NaCl)
Another brand i use is KCl 32usd for 40 pounds.
Ive found most stores do not stock kcl but "ship to store" is no extra charge and takes 3-5 days
"You can't do that" - challenge accepted
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Waffles SS
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I dont know here is right place to ask this question or not but what you think about using two Cathode one PbO2 electrode and another MMO electrode at
same time in electrolysis of salt?
This is possible to use those at same time as cathode?
Chemistry = Chem + is + Try
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mysteriusbhoice
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| Quote: Originally posted by Waffles SS | I dont know here is right place to ask this question or not but what you think about using two Cathode one PbO2 electrode and another MMO electrode at
same time in electrolysis of salt?
This is possible to use those at same time as cathode? |
you cannot use 2 different anodes PbO2 and Ir-Ru or Ir-Ta at the same time because one would sorta act like a cathode due to differences in operating
potential thus causing reduction and damage to the electrode.
Yes you can use 2 Ti/steel cathodes to get even current density loading.
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Waffles SS
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| Quote: Originally posted by mysteriusbhoice |
you cannot use 2 different anodes PbO2 and Ir-Ru or Ir-Ta at the same time because one would sorta act like a cathode due to differences in operating
potential thus causing reduction and damage to the electrode.
Yes you can use 2 Ti/steel cathodes to get even current density loading. |
Thanks and sorry for my mistake (I write Cathode instead of Anode)
My question was using two Anode(PbO2 and MMO) at same time and one Cathode(Ti) for electrolysis of brine.
[Edited on 6-9-2022 by Waffles SS]
Chemistry = Chem + is + Try
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mysteriusbhoice
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| Quote: Originally posted by Waffles SS |
Thanks and sorry for my mistake (I write Cathode instead of Anode)
My question was using two Anode(PbO2 and MMO) at same time and one Cathode(Ti) for electrolysis of brine.
[Edited on 6-9-2022 by Waffles SS] |
No that would be a bad idea because of the aforementioned problem with the difference in anode potential leading to excessive errosion of the PbO2.
The MMO would also corrode in a perchlorate cell unless it was Ir-Ta.
Also PbO2 doesnt like chloride environments and will errode in a chlorate cell like no tomorrow no matter what you dope it with.
Overall this is a bad idea.
The other reasons below:
A single cathode while it works ok with MMO, for PbO2 it doesnt like uneven current density loading and thus 2 cathodes is recommended for 1 anode.
For cells with 2 anodes:
For 2 anodes of the SAME type you can use 3 cathodes where each anode face must have the same current density loading because a gradient of current
density for some reason causes excessive errosion of PbO2.
[Edited on 7-9-2022 by mysteriusbhoice]
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