JERRY MASON / SCIENCE PHOTO LIBRARY JERRY MASON / SCIENCE PHOTO LIBRARY
Autocatalysis. Demonstration of autocatalysis using ethanedioate and manganate(VII) ions. Autocatalysis occurs when reaction products catalyse the reaction itself. In this case, a solution of potassium permanganate (purple) is added to a solution of ethanedioic acid (oxalic acid, colourless). One of the products, the manganese(II) ion, further catalyses the reaction, liberating large quantities of carbon dioxide and carbon monoxide gases.
Model release not required. Property release not required.