Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, May 06, 2006 10:57 PM
Subject: Re: [Homebrew_PCBs] Ferric Chloride - muck at bottom of tank
question


> On Sat, 06 May 2006 23:40:00 +0200, Leon Heller
> <leon.heller@...> wrote:
>
>>
>>
>> If a small amount is added, there won't be any fumes when it is heated.
>> I've
>>
>> never noticed any when I've done this.
>>
>>
>> Leon
>
>
> I know the boiling point of dilute solutions is high, even above that of
> water.
> But i have heated CuCl to about 50C once, and smelled a huge quantity of
> fumes from that tiny glass, much more than from the 2 liter tank (no smell
> noticeable). So i know the heating caused much more fumes to be released
> than normal. 38% HCl boils at 48C, i think even when not boiling higher
> temperature means much more fumes, like a steaming cup of tea.

There won't be any free HCl, it will all have reacted with the sludge.
That's why I don't get any fumes.

Leon

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