[NewCandle] silver dendrite deposition trial

[Nick Reiter]

Hi Keith,

Well, I have a small sealed volumetric flask now set
up with an Ag growth trial within it.

Here's the protocol.

I had taken .649g of the AgNO3 and made a .1M solution
in DI water.  This gave me 38ml of working stock
"broth".

I took a small strip, about 8mm x 12mm from Keith's
aluminum, and etched it in KOH for a few minutes to
give a smooth mat finish.  This was rinsed, dried, and
weighed.  I then bent the strip slightly to make a
little tent, placed it in a 50ml volumetric flask, and
re-weighed.

10ml of DI H2O was added, then 4.0ml of the .1M AgNO3
solution.  The flask was then capped.

If the reaction proceeds, then I will allow it to
progress until I see no more change in any growth.  I
will then decant off the liquor, rinse gently, decant
again, and then dry.  By my calculations and notes, if
100% of the available silver in solution plates out or
goes to dendrites, I should get 43.4 mg of Ag.  The
molar amount of Al lost in the process to the brine
should be easily calculated, and the weight
differential ought to represent the effectiveness of
the reaction.

At T+ 40 minutes or so, just a slight darkening of the
Al surface...

n

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