When dilute aqueous solutions of potassium manganate(VII), ethanedioic acid and sulfuric acid are mixed, the following reaction occurs:
The rate of reaction is slow at first, accelerates rapidly and then gradually slows down. The best
explanation for these observations is that the
A. reaction is exothermic, so after a small amount of reaction the temperature rises sharply.
B .reaction is acid catlysed and the formation of carbon dioxide results in an increased concentration of hydrogen ions.
C. reaction is catalysed by the manganese(II) ions which are formed in the reaction.
D. high concentration of hydrogen ions fromthe sulfuric acid inhibits the dissociation of the
ethanedioic acid.