A Voltaic Cell Is Based on the Following Two Half-Reactions

question 18

Multiple Choice

A voltaic cell is based on the following two half-reactions: Ni⁺²(aq) + 2e⁻ → Ni(s) E° = −0.25 V
Cr⁺³(aq) + 3e^- → Cr(s) E° = -0.74 V
Sketch the cell and then select the correct statement about it.

• A)Cr serves as the cathode.
• B)The direction of electron flow through the external wire is from the Ni to the Cr electrode.
• C)Anions in solution will migrate toward the Ni ⁺²/Ni electrode.
• D)The net cell reaction is 3Ni ⁺²( aq)+ 2Cr( s)→ 3Ni( s)+ 2Cr ⁺³( aq)
• E)= 0.99 V

---

Definitions:

Low Income

Refers to individuals or families that earn significantly less than the average income for their society or geographical area.

Accumulating Disadvantages

Refers to the process where disadvantages or negative circumstances build up over time, often exacerbating inequality.

Socio-emotional Selectivity Theory

A theory suggesting that as people age, they become more selective in their social relationships to maximize positive emotional experiences.

Stratification

The arrangement or classification of something, often society, into different groups or layers based on characteristics like wealth, race, or education.