Determine E°cell for the Reaction: 2 Al + 3 Zn²⁺

question 88

Multiple Choice

Determine E°cell for the reaction: 2 Al + 3 Zn²⁺ → 2 Al³⁺ + 3 Zn. The half reactions are: Al³⁺(aq) + 3 e- → Al(s)   E° = -1.676 V
Zn²⁺(aq) + 2 e- → Zn(s)   E° = -0.763 V

• A) 0.913 V
• B) -2.439 V
• C) 2.439 V
• D) -1.063 V
• E) -0.913 V

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Definitions:

Predetermined Overhead Rate

An estimated rate used to allocate manufacturing overhead costs to individual units of production.

Machine-Hours

A measure of the total hours machines are operated during the production of goods.

Direct Labor-Hours

The total hours worked by employees who are directly involved in the production process, used for calculating labor costs and efficiency.

Plantwide Predetermined Overhead

An overhead rate calculated for an entire manufacturing plant, applied to all products regardless of the specific department in which they were produced.