Given the Following Half-Reactions Occurring in the Silver-Zinc Hearing Aid

question 20

Multiple Choice

Given the following half-reactions occurring in the silver-zinc hearing aid battery, calculate the voltage at 25°C of this battery.
ZnO(s) + H₂O(l) + 2 e- → Zn(s) + 2 OH^-   E° = -1.260 V
Ag₂O(s) + H₂O(l) + 2 e- → 2 Ag(s) + 2 OH^-   E° = +0.342 V

• A) +1.602 V
• B) +1.402 V
• C) +0.858 V
• D) -0.858 V
• E) -1.602 V

---

Definitions:

Charles Darwin

A British naturalist best known for his contributions to the science of evolution, particularly the theory of natural selection.

Structuralism

The first formal school of thought in psychology, aimed at analyzing the basic elements, or structure, of conscious mental experience.

Conscious Mental Experience

The subjective experience of being aware of one's own thoughts, feelings, and sensations.

Introspection

The process of analyzing or scrutinizing one's own thoughts and feelings.