Chapter 4.8, Problem 4.13Q

(a)

Interpretation Introduction

Interpretation:

Chrome plating involves the reduction of ${\text{Cr}}^{\text{3+}}{}_{\text{(aq)}}$ at the surface of the electrode to be electroplated.  The electrode which is being electroplated will have a positive or negative charge has to explained.

Concept Introduction:

Oxidation is defined as a loss of electrons, loss of hydrogen atoms, or gain of oxygen

atoms.

Reduction is defined as a gain of electrons, gain of hydrogen atoms, or loss of oxygen atoms.

(b)

Interpretation Introduction

Interpretation:

Chrome plating involves the reduction of ${\text{Cr}}^{\text{3+}}{}_{\text{(aq)}}$ at the surface of the electrode to be electroplated.  The electrode is termed as cathode or anode has to be given.

Concept Introduction:

Refer part a.

(c)

Interpretation Introduction

Interpretation:

Chrome plating involves the reduction of ${\text{Cr}}^{\text{3+}}{}_{\text{(aq)}}$ at the surface of the electrode to be electroplated.  The reduction reaction for ${\text{Cr}}^{\text{3+}}{}_{\text{(aq)}}$ has to be written.

Concept Introduction:

Refer part a.