Potassium permanganate was treated with concentrated hot hydrochloric acid. The gas released during this was collected

Potassium permanganate was treated with concentrated hot hydrochloric acid. The gas released during this was collected, and a solution of potassium hydroxide was added dropwise to the reaction mixture until the precipitation ceased. The collected gas was passed through a hot potassium hydroxide solution to form a mixture of two salts. The solution was evaporated, the solid residue was calcined in the presence of a catalyst, after which one salt remained in the solid residue. Write the equations for the described reactions.

2KMnO4 + 16HCl → 2MnCl2 + 5Cl2 + 2KCl + 8H2O
MnCl2 + 2KOH → Mn (OH) 2 ↓ + 2KCl
6KOH + 3Cl2 → 5KCl + KClO3 + 3H2O
2KClO3 → 2KCl + 3O2