Chapter 17, Problem 46AE

Interpretation Introduction

Interpretation:

The equation of reaction of manganese with hydrochloric acid to form hydrogen gas and ${\text{Mn}}^{2+}$ has to be balanced.

Concept Introduction:

In order to balance any redox reaction method used in acidic medium is summarized below.

• In the first step oxidation number of each element is identified.
• The overall reaction is divided into oxidation and reduction held cell based upon changes observed in oxidation states.
• Each side of half-cell equation is balanced except $\text{H}$ and $\text{O}$.  The electrons lost are made equal to electron gained so as to add two half-cells and formulate overall reaction equation.
• In next step $\text{O}$ atoms are balanced by addition water molecule.
• For the acidic medium, excess electrons are neutralized by addition of ${\text{H}}^{+}$ ions to each side.