2 - which of the following is the oxidation half reaction of al - fe voltaic cell?\nal + 3e⁻ → al³⁺\nfe³⁺ +…

2 - which of the following is the oxidation half reaction of al - fe voltaic cell?\nal + 3e⁻ → al³⁺\nfe³⁺ + 3e⁻ → fe\nfe³⁺ → fe + 3e⁻\nal → al³⁺ + 3e⁻\n3 - which of the following is the reduction half reaction of al - fe voltaic cell?\nfe³⁺ + 3e⁻ → fe\nal → al³⁺ + 3e⁻

2 - which of the following is the oxidation half reaction of al - fe voltaic cell?\nal + 3e⁻ → al³⁺\nfe³⁺ + 3e⁻ → fe\nfe³⁺ → fe + 3e⁻\nal → al³⁺ + 3e⁻\n3 - which of the following is the reduction half reaction of al - fe voltaic cell?\nfe³⁺ + 3e⁻ → fe\nal → al³⁺ + 3e⁻

Answer

Answer:

  1. D. $\ce{Al \to Al^{3+}+ 3e^{-}}$
  2. A. $\ce{Fe^{3+}+ 3e^{-}\to Fe}$

Explanation:

Step1: Recall oxidation - reduction concept

Oxidation is loss of electrons.

Step2: Analyze Al - Fe cell

Al is more reactive than Fe. Al loses electrons. So $\ce{Al \to Al^{3+}+ 3e^{-}}$ is oxidation half - reaction.

Step3: Recall reduction concept

Reduction is gain of electrons.

Step4: Determine reduction half - reaction

$\ce{Fe^{3+}}$ gains electrons to form Fe. So $\ce{Fe^{3+}+ 3e^{-}\to Fe}$ is reduction half - reaction.