Message-Id: <v01540b0eaf334d351335@[192.174.2.170]>
Date: Fri, 21 Feb 1997 14:03:01 +0100
To: pinhole
From: emuller@exploratorium.edu (Eric Muller)
Subject: Reacting to pennies
To Pinhole Chemists,
A teacher recently called and had a question-
She placed pennies in a vinegar and salt solution. She expected the copper
to come out cleaner, but it came out dirtier.
What's going on? Any reasons for this?
-Eric