Interpretation: The similarity and difference between dry cells and alkaline batteries need to be explained.
Concept Introduction: A dry cell is a type of voltaic cell in which
Explanation of Solution
Similarity between dry cells and alkaline batteries:
Both dry cells and alkaline batteries are types of voltaic cells. Here, oxidation occurs at the anode and reduction at the cathode. In both dry cell and alkaline batteries, the zinc container acts as an anode, and the graphite rod as the cathode. In both cases, the graphite rod act as a conductor and does not undergo reduction even though it is a cathode. Here, the reduction of manganese (IV) oxide occurs at the cathode.
Differences between dry cells and alkaline batteries:
In a dry cell, a zinc container is filled with a paste (electrolyte) of manganese (IV) oxide or
Ammonia gas is not built up in the case of an alkaline battery. Here, the zinc electrode is also maintained as it corrodes slowly under basic conditions.
Chapter 21 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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