From: "Nail, John" <jnail**At_Symbol_Here**OKCU.EDU>
Subject: Re: [DCHAS-L] Concern about one of today's incident reports
Date: Wed, 22 Apr 2015 15:11:55 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Likely a 'waste' beaker from a General Chemistry Inorganic Qual experiment – specifically, determining if an unknown solution does or does not contain silver and/or mercury and/or lead by precipitating these cations as their chloride salts, then seeing
if the precipitate dissolves in an aqueous ammonia solution (silver chloride) or if it dissolves in hot water (lead chloride).
While I agree that the evacuation seems unnecessary, it may not be the teacher’s fault. The school may have a policy with which the teacher was complying and policies do not always make sense all of the time.
What I wonder is how all of those materials could be in solution: silver and chloride, lead and sulfate?
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