My guess is that it was a 14K silver plated copper chain, and the copper 
reacted with the acid.  There is no acid that will attack pure silver metal
at room temperature alone.  If there was then cleaning stains left by 
evaporated CS would be easy.

Marshall

Peter Rebaudo wrote:

> Marshall Wrote
>
> silver is one of the most inert metals there is, it is slightly more reactive 
> than gold, but
> not much. You can drop it into fuming nitric, sulfuric and hydrochloric acids
> (independently) and nothing happens.
>
> Marshal:
>
> As a child once I try to clean a silver chain in an Ounce of the acid tinners 
> use to solder. The chain completely dissolved after a few minutes.
>
> What kind of acid do You think it was?
>
> Peter R
>
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