"In what way and in what form does lead react with water?

Under normal conditions lead does not react with water. However, when lead
comes in contact with moist air reactivity with water increases. A small
lead oxide (PbO) layer forms at the surface of the metal. When both oxygen
and water are present, metallic lead is converted to lead hydroxide
(Pb(OH)2):

2Pb(s)+ O2(g) + 2H2O(l) -> 2 Pb(OH)2(s)


Solubility of lead and lead compounds

Elementary lead does not dissolve in water under normal conditions (20oC,
and pressure = 1 bar). It may however occur dissolved in water as PbCO3 or
Pb(CO3)22-. A well-known example of a water soluble lead compound is lead
sugar (lead(II)acetate), which derived its name from its sweet nature.
Lead frequently binds to sulphur in sulphide form (S2-), or to phosphor in
phosphate form (PO43-). In these forms lead is extremely insoluble, and is
present as immobile compounds in the environment. Lead compounds are
generally soluble in soft, slightly acidic water."

hopefully it helps...jk


abcd

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Joe Fjelstad
Sent: Monday, December 11, 2006 2:41 PM
To: [log in to unmask]
Subject: Re: [TN] The 'poisonous'- computer reports


Hello Joyce,

Thanks for the link.

I could not find any statements about phosphor toxicity in the  reference.

That aside, this might be the was the piece of work that caused  many to
believe that lead was a leaching problem.

As I understand it, the measurements were significantly off due to an
unspecified experimental or arithmetic error which has since been  admitted
by the
researchers.

Someone else may have better insight.

Very best,
Joe



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