7
Electrochemical Action
OBJECTIVES
In this chapter you will learn about:
- The purpose and construction of a simple cell
- Polarization and local action
- To define the terms E and internal resistance r of cell
- To perform calculations using V = E – Ir
- To determine the total e.m.f. and total internal resistance of cells connected in series and in parallel
- To distinguish between primary and secondary cells
- To explain the construction and practical applications of the Leclanche, lead-acid, nickel-cadmium mercury and silver-oxide cells
- List the advantages and disadvantages of alkaline cells over lead-acid cells
- Understand the term cell-capacity
- Charging of cells (constant current and constant voltage)
- Constructional details of secondary cells
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