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.

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Size: 4368px × 2912px
Location: San Clemente, CA
Photo credit: © Spencer Grant / Alamy / Afripics
License: Licensed
Model Released: No

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