Step 1:

The Stoichiometry equation:.

The balanced Equation is: .

Oxidizing Agent: An oxidizing agent (also oxidant, oxidizer or oxidizer) is the element or compound that accepts an electron from another species.

Reducing Agent: A Reducing agent (also called a reductant or reducer) is an element or compound that loses or donates an electron to another chemical species in a redox chemical reaction.

In the above chemical reaction, Pb increases in oxidation state from +2 to +4 and Cl decreases from +1 to -1.

As Pb increases in oxidation state, it is oxidized. Hence it acts as oxidizing agent.

As Cl decreases in oxidation state, it is de-oxidized. Hence it acts as reducing agent.

Solution:

The balanced Equation is: .

Pb is an oxidizing agent.

Cl is an reducing agent.