49.7 MB (3.3 MB compressed)
5106 x 3404 pixels
43.2 x 28.7 cm ⏐ 17.0 x 11.3 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Metal salts. Front, coloured, left to right: copper(II) sulfate pentahydrate (CuSO4 5H20), copper(II) chloride dihydrate (CuCl2 2H20), iron(II) sulfate heptahydrate (FeSO4 7H2O), cobalt(II) chloride hexahydrate (CoCl2 6H2O). Back, white, left to right: zinc sulfate heptahydrate, hydrated aluminum sulfate. Transition metal salts are often coloured, with zinc salts being a notable exception.
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