Write the chemical equations for the preparation of KMnO4 from MnO2.

Asked by sanjeet.kumar | 12th Mar, 2019, 02:21: PM

Expert Answer:

Preparation of potassium permanganate: Potassium permanganate is prepared by the fusion of MnO2 (pyrolusite) with potassium hydroxide and an oxidizing agent like KNO3 to form potassium manganate (green mass), which disproportionate in a neutral or acidic solution to form permanganate.

 2 MnO subscript 2 space plus space 4 KOH space plus space straight O subscript 2 space rightwards arrow with heat on top stack space stack 2 straight K subscript 2 MnO subscript 4 with Potassium space below with magnate below space plus space 2 straight H subscript 2 straight O

stack space stack 2 straight K subscript 2 MnO subscript 4 with Potassium space below with magnate below space plus 4 HCl space rightwards arrow with blank on top space stack stack 2 KMnO subscript 4 with Potassium below with Permagnate below space plus space MnO subscript 2 space plus space straight H subscript 2 straight O space plus space 4 KCl

Answered by Ramandeep | 12th Mar, 2019, 07:24: PM