What is the standard reduction potential of the half-reaction Fe^3+ + 3e- → Fe?

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Question: What is the standard reduction potential of the half-reaction Fe^3+ + 3e- → Fe? (2022)

Options:

Correct Answer: +0.77 V

Exam Year: 2022

Solution:

The standard reduction potential for the half-reaction Fe^3+ + 3e- → Fe is +0.77 V, indicating a strong tendency to gain electrons.

What is the standard reduction potential of the half-reaction Fe^3+ + 3e- → Fe? (2022)

What is the standard reduction potential of the half-reaction Fe^3+ + 3e- → Fe? (2022)

Step 1: Understand what a half-reaction is. A half-reaction shows either the reduction or oxidation of a substance.
Step 2: Identify the half-reaction given: Fe^3+ + 3e- → Fe. This means iron ions (Fe^3+) are gaining electrons (3e-) to become solid iron (Fe).
Step 3: Know that the standard reduction potential measures how likely a substance is to gain electrons. A higher value means a stronger tendency to gain electrons.
Step 4: Look up the standard reduction potential for the half-reaction Fe^3+ + 3e- → Fe in a standard reference table or database.
Step 5: Find that the standard reduction potential for this half-reaction is +0.77 V.
Step 6: Conclude that +0.77 V indicates that Fe^3+ has a strong tendency to gain electrons and be reduced to Fe.

No concepts available.