B-Z Chemical oscillations in nitric acid and phosphoric acid medium with gallic acid as substrate and ferroin and Mn(II) ions as catalyst

摘要

Chemical oscillations have been studied both visually and potentiometrically with gallic acid as substrate in a new acid medium, i.e., HNO_3 medium with ferroin as catalyst. The oscillations are very much pronounced. Studies have also been made in H_3PO_4 medium using Mn(II) ions as catalsyt which is also a new combination. The oscillation parameters have been found to obey certain simple relations. A comparison has also been made with previous studies in H_2SO_4 and HClO_4 media.