The constant voltage during controlled-potential electrolysis has to be identified. Also the working, auxiliary and reference electrodes have to be identified. Concept Introduction: Working electrode: In electrochemical reaction, an electrode where main reaction occurs is called working electrode. It is placed in between auxiliary and reference electrode. Reference electrode: An electrode which can measure working electrode’s potential is called reference electrode. It is also known as calomel electrode. Auxiliary electrode: It is an electrode which supports current flow in working electrode. It is also called as counter electrode.

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Chapter 17, Problem 17.5P

(a)

Interpretation Introduction

Interpretation:

The constant voltage during controlled-potential electrolysis has to be identified. Also the working, auxiliary and reference electrodes have to be identified.

Concept Introduction:

Working electrode: In electrochemical reaction, an electrode where main reaction occurs is called working electrode. It is placed in between auxiliary and reference electrode.

Reference electrode: An electrode which can measure working electrode’s potential is called reference electrode. It is also known as calomel electrode.

Auxiliary electrode: It is an electrode which supports current flow in working electrode. It is also called as counter electrode.

(b)

Interpretation Introduction

Interpretation:

The Luggin capillary and its measuring of potential has to be explained.

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