Abstract Potassium permanganate is a common oxidizing agent, and its oxidizing strength is related to the acid base of the system. The effects of system acidity and alkalinity on the oxidability of potassium permanganate were investigated by using the REDOX potential (ORP) sensor and pH sensor with handheld technology. The results showed that the oxidation of potassium permanganate solution was significantly enhanced under acidic conditions, and continued to increase with the decrease of pH value. Under alkaline conditions, its oxidizability decreased obviously, and with the increase of pH value, its oxidizability continued to decrease. In the actual experiment, potassium permanganate solution suitable for acid and base should be selected as oxidizer according to various comprehensive factors.
SONG Lin, JIANG Yan-Xia. Study on Effects of Acidity and Alkalinity on the Oxidability of Potassium Permanganate by Handheld Technology[J]. Chinese Journal of Chemical Education, 2020, 41(19): 103-106.
