Compounds of Mn and Cr (KMnO₄ and K₂Cr₂O₇)

Two compounds dominate the laboratory and industrial chemistry of manganese and chromium: potassium permanganate, $\mathrm{KMnO_4}$, and potassium dichromate, $\mathrm{K_2Cr_2O_7}$. The subsections that follow take up each in turn — preparation, chemical properties and uses. …