5. In an 100 ml beaker, get ~60 ml of 3M
HCl.
6. Attach copper wire to one of the zinc
washers.
7. Dip the washer in the beaker of HCl and
observe the reaction.
Zn (s) + 2 HCl →
H2(g)
+ ZnCl2 (aq)
8. Allow the reaction to continue until
bubbling stops, approximately 90 sec. (The surface will change from shiny silver to a dull
gray.)
9. Remove the washer from the acid and rinse
with distilled water over a waste beaker.