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9.5 Electrochemical Cells

Now let us learn about cells which generate electricity. A device which generates electrical energy from chemical energy is called an Electrochemical cell. e.g. transistor cell ( dry cell )

 


A Zinc rod is placed in Zinc sulfate solution separated by a diaphragm from the copper sulfate solution placed with a copper rod. An electron flow is produced by spontaneous oxidation-reduction reactions taking place at the electrodes.

Reaction :

The electrode at which oxidation takes place is called the positive (+) electrode and conversely the reduction electrode is termed as the negative (-) electrode.

Types of Electrodes

Index

9.1 Introduction
9.2 Electrolytic Cell
9.3 Electrolytes
9.4 Faraday's Law of Electrolysis
9.5 Electrochemical Cell
9.6 Electrode Potential

Chapter 10




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