Chapter 19, Problem 19.158MP

Interpretation Introduction

(a)

Interpretation:

The balanced net ionic equation for the titration reaction should be written.

Concept introduction:

When balancing half-cell reactions occur in acidic or basic medium, additional rules have to be followed.

• First the elements in the reaction except oxygen and hydrogen should be balanced.
• Oxygen atoms are balanced by adding water molecules to opposite side of the equation.
• Hydrogen atoms are balanced by adding ${\text{H}}^{+}$ ions to the opposite side of the equation.
• Charges are made equal by adding electrons to more positive side.

Interpretation Introduction

(b)

Interpretation:

The cell potential at the equivalence point should be determined.

Concept introduction:

Cell potential at equivalence point in a redox titration can be calculated by following equation.

$E_{eq}=\frac{n_{titrand}{E}_{titrand}^0+n_{titrant}{E}_{titrant}^0}{n_{titrand}+n_{titrant}}$