Homebrew PCBs

Yeah, my brain was saying reduce the solution (by evaporating off the water) to reach a 40% HCl concentration. I did say I know next
to nothing about chemistry! BTW, isn't 40%, 37%, 32%, or 10% all levels of 'concentration'? There must be something else I'm not
understanding.

Thanks,

Roger

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of Adam Seychell
Sent: Tuesday, January 19, 2010 6:03 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Re: Reducing concentration of HCl from 10% to 40%

 

  

Roger Blair wrote:
> 
> 
> Stefan,
> 
> Yes, there is. Finally after half a dozen different places that only 
> sell 10% HCl, or muriatic acid "replacement" , today I finally
> found a bona fide single purpose pool supply establishment that still 
> carried 2 gallon packs of 32% (Muriatic Acid) HCl for $11,
> same price as the 10% stuff. Several Chemical supply outlets I tried 
> would not sell hazmat to individuals, or wanted $25 or more for
> hazmat shipping charges on top of up to $138 for 37% stuff. I'm going to 
> try the 32% HCl.
> 
> Thanks everyone for the help,
> 
> Roger

Just a note, 32%(wt) HCl is still "concentrated". You'll be hard pressed 
finding %40 HCl because vapour pressure is so high that the HCl gas will 
quickly escape, then slowing down as concentration drops to more a 
stable %35~%30 (wt).

Also note your post subject line is contradictory.





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