Re: water

From: Dave Evans (dpevans@rci.rutgers.edu)
Date: Wed Dec 29 1999 - 13:59:26 PST

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Date: Wed, 29 Dec 1999 16:59:26 -0500
From: "Dave Evans" <dpevans@rci.rutgers.edu>
To: cp@opus.hpl.hp.com
Message-Id: <aabcdefg4272$foo@default>
Subject: Re: water

Dear Carl,

> Actually, the boiling method removes *suspended* solids, not dissolved
> minerals. In general, boiling will increase the amount of dissolved
> material since most salts are *more* soluble in hot water than in cold
> water - so boiling the water brings the solution closer to saturation
after
> subsequent cooling.
> The suspended solids can be removed by pouring off the cooled water after
> boiling, and of course, any dissolved gasses (eg chlorine) tend to be
> driven out of the solution during boiling, too.

What about CaCO3 in the water? If you boil the water, will not the CO2
be driven off leaving Ca(OH)2 (isn't it less soluble than carbonate?) to
preciptate out?

Dave Evans

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