12 H2SO4 (aq) + 8 KMnO4 (aq) + 5 NiS (s) 12 H2O (l) + 4 K2SO4 (aq) + 8 MnSO4 (aq) + 5 NiSO4 (aq)

This is an oxidation-reduction (redox) reaction:

8 MnVII + 40 e- 8 MnII (reduction)

5 S-II - 40 e- 5 SVI (oxidation)

KMnO4 is an oxidizing agent, NiS is a reducing agent.

Reactants:

  • H2SO4Sulfuric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Oil of vitriol source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Sulfuric acid, concentrated (> 51% and < 100%) source: ICSC, accessed: 2019-09-04, H2SO4 source: wikidata, accessed: 2019-09-07
    • Appearance: Clear, colorless liquid source: wikipedia, accessed: 2019-09-27; Odourless colourless oily hygroscopic liquid source: ICSC, accessed: 2019-09-04; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed: 2019-09-02
  • KMnO4Potassium manganate(VII) source: wikipedia, accessed: 2019-09-27
    • Other names: Potassium permanganate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Chameleon mineral source: wikipedia, accessed: 2019-09-27, Condy's crystals source: wikipedia, accessed: 2019-09-27
    • Appearance: Purplish-bronze-gray needles | magenta–rose in solution source: wikipedia, accessed: 2019-09-27; Dark purple crystals source: ICSC, accessed: 2019-09-04
  • NiSNickel sulfide {{cite web | url=https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=28094&loc=ec_rcs source: wikipedia, accessed: 2019-09-27
    • Other names: Nickel sulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Nickel monosulfide source: wikipedia, accessed: 2019-09-27, Nickelous sulfide source: wikipedia, accessed: 2019-09-27, Nickel(II) sulfide source: wikidata, accessed: 2019-09-02
    • Appearance: Black solid source: wikipedia, accessed: 2019-09-27

Products:

  • H2OWater, oxidane source: wikipedia, accessed: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27
  • K2SO4
    • Names: Potassium sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Potassium sulphate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Dipotassium sulfate source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; Colourless-to-white crystals source: ICSC, accessed: 2019-09-04
  • MnSO4Manganese(II) sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: MnSO4 source: wikidata, accessed: 2019-09-02, Manganese sulfate anhydrous source: wikidata, accessed: 2019-09-02, Manganese sulphate source: wikidata, accessed: 2019-09-02
    • Appearance: White crystals (anhydrous) | pale pink solid (hydrates) source: wikipedia, accessed: 2019-09-27
  • NiSO4Nickel(II) sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Nickelous sulfate source: wikipedia, accessed: 2019-09-27, Nickel(ii)sulphate source: ICSC, accessed: 2019-09-04, NiSO4 source: wikidata, accessed: 2019-09-02
    • Appearance: Yellow solid (anhydrous) | blue crystals (hexahydrate) | green-blue crystals (heptahydrate) source: wikipedia, accessed: 2019-09-27; Yellow-to-green crystals source: ICSC, accessed: 2019-09-04