299 H2SO4 (aq) + 122 KMnO4 (aq) + 10 K4Fe(CN)6 (aq) 188 H2O (l) + 60 HNO3 (aq) + 60 CO2 (g) + 122 MnSO4 (aq) + 5 Fe2(SO4)3 (s) + 162 KHSO4 (aq)

This is an oxidation-reduction (redox) reaction:

122 MnVII + 610 e- 122 MnII (reduction)

60 CII - 120 e- 60 CIV (oxidation)

60 N-III - 480 e- 60 NV (oxidation)

10 FeII - 10 e- 10 FeIII (oxidation)

KMnO4 is an oxidizing agent, K4Fe(CN)6 is a reducing agent, K4Fe(CN)6 is a reducing agent, K4Fe(CN)6 is a reducing agent.

This is a precipitation reaction: Fe2(SO4)3 is the formed precipitate.

This is a gas evolution reaction, CO2 is the formed gas.

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
  • K4Fe(CN)6

    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
    • HNO3Nitric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
      • Other names: Aqua fortis source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Spirit of niter source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Eau forte source: wikipedia, accessed: 2019-09-27
      • Appearance: Colorless, yellow or red fuming liquid source: wikipedia, accessed: 2019-09-27; Colourless-to-yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.] source: NIOSH NPG, accessed: 2019-09-02
    • CO2
      • Names: Carbon dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, CO2 source: wikidata, accessed: 2019-09-02, Carbonic acid gas source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
      • Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless colourless compressed liquefied gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] source: NIOSH NPG, accessed: 2019-09-02
    • 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
    • Fe2(SO4)3Iron(III) sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
      • Other names: Ferric sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Sulfuric acid source: wikipedia, accessed: 2019-09-27, Iron(3+) salt (3:2) source: wikipedia, accessed: 2019-09-27
      • Appearance: Grayish-white crystals source: wikipedia, accessed: 2019-09-27
    • KHSO4Potassium hydrogen sulfate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04
      • Other names: Potassium bisulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Potassium acid sulfate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Potassium Hydrogen Sulphate source: wikidata, accessed: 2019-09-02
      • Appearance: Colorless solid source: wikipedia, accessed: 2019-09-27; Colourless-to-white hygroscopic crystals or crystalline powder source: ICSC, accessed: 2019-09-04