If Silver Nitrate is taken in by mouth, it can have dangerous effects and sometimes cause death also.
It is used in very dilute solutions for medical applications.
If there is any doubt as to the origins of those chlorides then further chemical analysis will be required.
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For a more thorough discussion of this process and most every other refining process known to man, go to goldrefiningforum.
What you need 1 — A Volumetric Flask.