Chapter 8, Problem 18P

(a)

Interpretation Introduction

Interpretation:

Which of the given changes is the reactant undergoes oxidation should be identified. Explain.

Concept introduction:

• Oxidation-reduction reaction is a reaction in which one reactant is oxidized and another is reduced. It is also known as a redox reaction.
• Oxidizing agent is a reactant of a reaction which causes an oxidation through accepting electron.
• Reducing agent is a reactant of a reaction which causes a reduction through donating electron.
• Oxidation is a process in which either loss of electrons, gain of oxygen atoms, oxidation number increase or loss of hydrogen occurs.
• Reduction is a process in which either gain of electrons, oxidation number decreases, loss of oxygen atoms or gain of hydrogen atom occurs.

Correct answer:

Inoxidation state of chlorine increases from -1 to 0. Thus, oxidation takes place.