High school chemistry students in San Clemente, CA, dip a copper penny in a sodium hydroxide (NaOH) over a Bunsen burner in preparation for creating zinc alloy on a copper penny. Note aprons and safety goggles.
Size: 2912px × 4368px
Location: San Clemente, CA
Photo credit: © Spencer Grant / Alamy / Afripics
License: Licensed
Model Released: No
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