70.3 MB (5.1 MB compressed)
3512 x 7000 pixels
29.7 x 59.2 cm ⏐ 11.7 x 23.3 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Copper reacting with silver nitrate. US copper penny (1 cent coin minted in 1962) was half-submerged into a Petri dish containing a 0.2M solution of silver nitrate (AgNO3). Since copper is more reactive than silver, a single-displacement reaction occurred: Cu + AgNO3 -> Ag + Cu(NO3)2. In this sequence top frame was taken before the coin was put into the solution, middle frame was taken after it had been in the solution for 1 min, bottom frame was taken after the coin had been in the solution for 8 min and then removed. Note metal silver that remained in the solution at the end.
Model release not required. Property release not required.