70.5 MB (5.3 MB compressed)
7000 x 3521 pixels
59.2 x 29.7 cm ⏐ 23.3 x 11.7 in (300dpi)
TURTLE ROCK SCIENTIFIC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY TURTLE ROCK SCIENTIFIC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
Copper reacts with nitric acid. US copper penny (1 cent coin minted in 1980) is partially immersed into concentrated (8M) nitric acid (HNO3). Copper is oxidized to form blue copper nitrate (Cu(NO3)2) and brown nitrogen dioxide gas (NO2) bubbles: Cu + HNO3 -> Cu(NO3)2 + NO2 + H2O.
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