WHY DO PENNIES TURN SILVER WHEN PLACED IN NAOH,HCL AND ZINC AND HEATED?

Subject: WHY DO PENNIES TURN SILVER WHEN PLACED IN NAOH,HCL AND ZINC AND HEATED?

Date: Wed Mar 15 20:34:39 2000
Posted by BARBARA WILLIAMS
Grade level: teacher/prof School: TEACHER SPRINGBROOK HS
City: SILVER SPRING State/Province: MD Country: MONTGOMERY
Area of science: Chemistry
ID: 953174079.Ch

Message:


I THINK I HAVE SOME IDEA BUT WOULD LIKE TO FEEL CONFIDENT IN MY 
EXPLAINATION TO MY STUDENTS.  ALSO WHY DOES THE PENNY CHANGE FROM SILVER 
TO GOLD WHEN PLACED DIRECTLY INTO FLAME.  THESE ARE CHEMICAL CHANGES 
AREN'T THEY?  THANKS B. WILLIAMS

PS I THINK YOU WEB SITE IS GREAT!!!!

Re: WHY DO PENNIES TURN SILVER WHEN PLACED IN NAOH,HCL AND ZINC AND HEATED?

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