Write the equation for the reactions between manganese III oxide and hydrochloric acid.

A similar reaction refers to redox, Mn in the Mno2 compound has an oxidation state of +4 (this is an intermediate state, therefore sarganese can be both an oxidizing agent and a reducing agent), and Cl in HCl is in the minimum oxidation state -1, therefore it can only increase it and oxidize (i.e. chlorine-reducing agent). Now we will compose the reaction equation: MnO2 + HCl-> MnCl2 + Cl2 + H2O The main thing is to never forget about the coefficients, for this we write down the half-reactions Mn (+4) + 2ē-> Mn (+2) 2Cl (-1) -2ē-> Cl2 (0) The final equation now looks like this: MnO2 + 4HCl-> MnCl2 + Cl2 + 2H2O.