Explanation:
KMnO4 + H2S + HCl --> KCl + MnCl2 + H2O + S8
Did Cl change oxidation number?
The oxidation number of Cl in Reactant side is -1
The oxidation number of Cl in product side is -1
NO
Did Oxygen change oxidation number?
The oxidation number of O in Reactant side is -2
The oxidation number of O in product side is -2
NO
Did H change oxidation number?
The oxidation number of H in Reactant side is 1
The oxidation number of H in product side is 1
NO
Did Mn change oxidation number?
The oxidation number of Mn in Reactant side is +7
The oxidation number of Mn in product side is +2
YES
Did S change oxidation number?
The oxidation number of S in Reactant side is -2
The oxidation number of S in product side is 0
YES
Oxidizing agent (element with decrease in oxidation number) = Mn
Reducing agent (element with Increase in oxidation number) = S
