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:

Signal Detection

Signal detection involves the process of identifying and processing sensory stimuli or signals, discerning them from background noise, and making decisions based on that information.

Phantom Limb Sensations

The phenomenon where individuals feel sensations or even pain in a limb or a part of a limb that has been amputated.

Posthypnotic Suggestion

An instruction given to a person under hypnosis that is intended to be acted upon after he or she has awakened from the hypnotic state.

Synesthesia

A condition where one type of sensory stimulus involuntarily prompts the perception of another sense.