49.4 MB (2.5 MB compressed)
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28.4 x 43.4 cm ⏐ 11.2 x 17.1 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Barium sulphate precipitate, 3 of 3. Barium sulphate (BaSO4) precipitate formed by adding barium chloride solution (BaCl2) drop by drop to zinc sulphate solution (ZnSO4). Both solutions are 0.5 M concentration. The reaction is ZnSO4 + BaCl2 -> BaSO4 + ZnCl2. This is an example of a double replacement reaction.
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