hi all,
i am trying to electrodeposit Sn on Cu, and some carbon substrate. my electrolyte is SnCl2.2H2O in a 2M KOH solution.
i notice that after adding SnCl2.2H2O to KOH solution a very transparent solution (like water) is achieved and no electroplating happens. i expect the solution to be cloudy but it is not !
you have any suggestion what is wrong with it? or any comment or procedure to make the deposition solution? i am guessing that i might not make the solution in the right sequence (?)(i add SnCl2.2H2O to KOH solution)
thanks for your help.
dear Hesam Rabiee ;
I think this video is interesting for you;
https://www.youtube.com/watch?time_continue=311&v=Hsw3lOnHaas
Hesamoddin Rabiee
Since you added SnCl2 directly to KOH, the KOH is excessive. The most probable reaction is that Sn2+ reacts with OH- and form water-soluble K2[Sn(OH)4].
Probably you have redox, on anode oxidation of Sn2+ to Sn4+ and on cathode reducrion of Sn4+ to Sn2+ (most likely as hydroxo complex). Similar happens with Fe3+/Fe2+ system
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