Consider a Voltaic Cell That Operates from the Following Redox

question 42

Multiple Choice

Consider a voltaic cell that operates from the following redox reaction:
Al (s) + Cr³⁺ (aq) →Al³⁺ (aq) + Cr (s) What half-reaction operates at the positive electrode of this cell?

• A) Al (s)→ Al³⁺ (aq) + 3 e ^-
• B) Al³⁺ (aq) + 3 e ^- → Al (s)
• C) Cr (s)→ Cr³⁺ (aq) + 3 e ^-
• D) Cr³⁺ (aq) + 3 e ^- → Cr (s)
• E) Al³⁺ (aq) + 3 e ^- → Cr (s)

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