This also suggests that oxygen plays a role in the size and shape of the
crystal lattice structure which might also play a role in the "color" of a
colloidal particle.
 It is easily observable that H2O2 clears up a colored CS very quickly.
Ken


>http://www.burnsurgery.org/Betaweb/Modules/silver/section3.htm
>(well worth reading, if you are into silver ions)
>'This unique physical structure, in combination with the oxygen
>atoms/molecules that are trapped in the crystal lattice, contribute to
>the enhanced solubility of the films which continue to release silver
>until the concentration in solution reached 66 mg/L a level that is 50
>to 100 times higher than is expected from typical bulk pieces of silver
>metal. Handbook of Chemistry and Physics, 55th ed., CRC Press,
>Cleveland, 1974, pp B-134.'
>
>This passage would seem to suggest one can expect a concentration of
>0.66 - 1.32mg/L to be eventually reached in solution.
>
>Ivan.
>
>----- Original Message -----
>From: "Frank Key" <fr...@strsoft.com>
>To: <silver-list@eskimo.com>
>Sent: Thursday, 22 March 2001 08:35
>Subject: Re: CS>Fwd: Dr. Jon's Special Silver FAQ's 3-19-01
>
>
>> Dean wrote:
>>
>> > I see.  So what is it that increases the conductivity of the water
>> > after a few days when a silver ingot has been added?
>>
>> If you believe that silver is dissolving in water, then try a simple
>test;
>>
>> 1. Using a lab balance that reads to 5 places in grams, determine the
>weight
>> (mass) of a small pure silver object.
>>
>> 2. Place this object in pure DI water for a period of time (hours,
>days, etc).
>>
>> 3. Remove the object and again weigh it.
>>
>> This will tell you if you are dissolving silver in water.
>>
>> > If silver particles don't change the conductivity, then the silver
>> > must be going into the water as ionic silver.
>>
>> Since silver is not water soluble, then silver ions are not being
>added to the
>> water. The change in conductivity is probably the result of the
>addition of
>> absorbed gasses.
>>
>> To test this theory, draw some pure DI water and measure its
>conductivity.
>> Place part in an open container, and part in an evacuated container
>(vacuum or
>> filled with an inert gas such as argon).
>> Let both containers sit for about a few days, then measure the
>conductivity.
>>
>> The increased conductivity of the open container demonstrates the
>absorption
>> of gases.
>>
>> > I admit that my chem classes in college were some time ago, but I
>have
>> > been under the (probably erroneous) impression that "to dissolve"
>> > meant to "make ions" of whatever's being dissolved.
>>
>> Indeed, dissolving does cause ions to be added to the solution. The
>problem lies in the fact that silver is not water soluble.
>>
>> The only way to dissolve silver in water is to pass an electric
>current through
>> it. This forces the removal of an orbital electron from an atom of
>silver changing it to a silver ion which is water soluble.
>>
>> frank key
>
>
>
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