K2MnO4 is an oxidizing agent, HCl is a reducing agent.
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Reactants:
K2MnO4 – Potassium manganate(VI)
Other names: Potassium manganate
Appearance: Green crystals (darkening with time)
HCl – Chlorane, Hydrogen chloride
Other names: Hydrochloric acid, M, Uriatic acid
Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
Other names: Manganous chloride, Manganous dichloride, Manganese(II) chloride (1:2)
Appearance: Pink solid (tetrahydrate)
KCl
Names: Potassium chloride, Sylvite, Muriate of potash
Appearance: White crystalline solid ; Colourless hygroscopic crystals
Cl2
Names: Chlorine, Molecular chlorine
Appearance: Greenish-yellow compressed liquefied gas with pungent odour ; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxide
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas