SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Moissan isolating fluorine. Historical artwork of the French chemist Henri Moissan (1852-1907) isolating fluorine in 1886. The electrolysis set-up at right centres on a beaker containing a U-tube in a cooling liquid (at minus 23 degrees Celsius). The U-tube contains a solution of potassium fluoride (provides electrical conductivity) in hydrofluoric acid. The electrical wires connect to electrodes (iridium/platinum) dipped inside the U-tube. Side tubes allow collection of the products (hydrogen gas, right; fluorine gas [yellow], left). Moissan was awarded the 1906 Nobel Prize for Chemistry for his work on fluorine and electric arc furnaces. From Physique Populaire (E. Desbeaux, 1891).
Model release not required. Property release not required.