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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro
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Use half-cell reactions to determine the overall reaction that occurs in an alkaline

Chapter 16, Problem 89P

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QUESTION:

Problem 89P

Use half-cell reactions to determine the overall reaction that occurs in an alkaline battery.

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QUESTION:

Problem 89P

Use half-cell reactions to determine the overall reaction that occurs in an alkaline battery.

ANSWER:

Solution 89P:

Here, we are going to use the half cell reactions to determine the overall reaction occurring in an alkaline battery.

Step1:

Alkaline batteries are the cells with a long life and an alkaline solution of potassium hydroxide.

The cell is cylindrical in shape contained in a drawn steel can(acts as cathode current collector). The negative terminal(anode) of the alkaline battery is made of zinc powder in a gel containing the potassium hydroxide electrolyte.

The positive terminal(cathode) is a compressed paste of manganese dioxide(MnO2) with carbon powder. The hollow centre in the cathode is lined with a separator to prevent the mixing of cathode and anode materials. The diagrammatic representation of an alkaline battery is given below:

                                

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