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Use half-cell reactions to determine the overall reaction that occurs in an alkaline
Chapter 16, Problem 89P(choose chapter or problem)
Problem 89P
Use half-cell reactions to determine the overall reaction that occurs in an alkaline battery.
Questions & Answers
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: