Hi,
I have this question for long time, at the wikipedia entry of ammonium
persulfate of my language is written:
(quick translation)
"(..)
Is possible to make ammonium persulfate at home using
∗ 1 liter deionized water
∗ 2g sodium hydroxide
∗ 0,5g of any mercury salt ( like mercury nitrate )
(..)"
My question: isn't this wrong??
So its like:
H2O(l) + NaOH(aq) + Hg(NO3)2(aq) -> (NH4)2S2O8
Which seems impossible in my low skills chemistry
I looked at other language versions and none says anything like this,
googling for it only gives what seems copy cats. Ammonium persulfate is
said to be made by electrolysis of ammonium sulfate and sulfuric acid.
About 10 years ago I asked someone for ferric chloride alternatives i
remember he says something similar (don't remember the names but was a
salt and caustic soda solution). So whatever gets from that mixture
etches copper??
Since i am writing this is, possible to mix ammonium hydroxide (i get it
here by 2eur liter in 25% as detergent) and sulfuric acid (i get it here
at 1,5eur liter 98%) and do electrolysis with titanium electrodes and
get ammonium persulfate?
Just asking because once i bought the ammonium hydroxide and once I open
it I wanted to jump in the window to get ride of that horrible smell but
was in a 3rd floor :$ never used and no intentions to.
But is ammonium persulfate reusable? like sodium persulfate or cupric
chloride?
Oh and my language is Portuguese as in
http://pt.wikipedia.org/wiki/Persulfato_de_am%C3%B4niaAnother question, i would like to setup a sodium persulfate etcher, i
tried titanium electrodes and they where dissolved in the bath (the
anode one), is any titanium alloy suitable or i can't escape to buy a
platinum anode for this?
And is possible to copper electroplate pcb boards with this same sodium
persulfate bath?? (this is only why i wish to have it)
I can get sodium hiposulfite (NaHS04) at 2eur/Kg (pH- for swimming
pools) can i start from this to get the etchant or i should go for
sodium sulfate?
Like this:
NaOH(aq) + H2SO4(aq) → NaHSO4(aq)
NaHSO4(aq) + NaOH(aq) + e- → Na2SO4(aq) + H20(l)
Na2SO4(aq) + H2SO4(aq) + e- → Na2(SO4)2(aq) + H2(g)
(shouldn't work like this but is an idea of what would be great and
simpler)
Thanks,
Simao