MadSci Network: Chemistry

Subject: salt vinegar reaction on silver

Date: Tue Aug 16 14:34:01 2005
Posted by Deborah
Grade level: K-3 School: Son-raise Academy
City: Overland Park State/Province: KS Country: USA
Area of science: Chemistry
ID: 1124220841.Ch

My child cleaned copper pennies with vinegar and salt which revealed a 
beautiful shiny penny (and we have read why this happens).  He decided to 
clean his silver 1921 Morgan dollar (unbeknowing to me) which produced a 
corosive black dot effect upon the face of the coin.  What can we do to repair?

Re: salt vinegar reaction on silver

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