Answer:
4 HCl (aq) + MnO2 (s) → MnCl2 (aq) + Cl2 (g) + 2 H2O (l)
This is an oxidation-reduction (redox) reaction:
MnIV + 2 e- → MnII (reduction)
2 Cl-I - 2 e- → 2 Cl0 (oxidation)
MnO2 is an oxidizing agent, HCl is a reducing agent.
Reactants:
HCl – Chlorane, Hydrogen chloride
Other names: Hydrochloric 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.]
MnO2 – Manganese oxide, Manganese(IV) oxide
Other names: Manganese dioxide, Pyrolusite, Hyperoxide of manganese
Appearance: Brown-black solid Black-to-brown powder
Products:
MnCl2 – Manganese(II) chloride, Manganese dichloride
Other names: Manganous chloride, Manganous dichloride Manganese(II) chloride (1:2)
Appearance: Pink solid (tetrahydrate)
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
Step-by-step explanation: