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AP Chemistry
9.9 Cell Potential and Free Energy
9.3 Gibbs Free Energy and Thermodynamic Favorability
4.9 Oxidation-Reduction (Redox) Reactions
Multi-Unit
AdvancedMCQGraphicalMathematicalConceptual15.9k
A grayscale Cartesian coordinate graph displaying standard reduction potentials. The vertical y-axis is labeled 'Standard reduction potential, \(E^\circ\) (V)' with numerical tick marks and thin horizontal gridlines at \(-0.60\), \(-0.40\), \(-0.20\), \(0.00\), \(+0.20\), \(+0.40\), \(+0.60\), \(+0.80\), \(+1.00\), \(+1.20\), and \(+1.40\). The horizontal x-axis is labeled 'Reduction half-reaction' with three evenly spaced discrete entries: '\(\text{M}^+\text{(aq)} + \text{e}^- \rightarrow \text{M(s)}\)', '\(\text{M}^{2+}\text{(aq)} + \text{e}^- \rightarrow \text{M}^+\text{(aq)}\)', and '\(\text{M}^{3+}\text{(aq)} + \text{e}^- \rightarrow \text{M}^{2+}\text{(aq)}\)'. Exactly three data points are plotted as filled black circles: at the first entry at \(y = -0.30\), at the second entry at \(y = +1.10\), and at the third entry at \(y = +0.20\). A single thin solid black line connects the three points sequentially from left to right. No other particles, labels, text, or annotations appear.
Plot of \(E^\circ\) values for sequential one-electron reduction half-reactions of metal \(\text{M}\).
A student investigates the aqueous redox chemistry of a transition metal, \(\text{M}\). The standard reduction potential, \(E^\circ\), for each sequential one-electron reduction between adjacent oxidation states at \(298 \text{ K}\) is plotted in the graph below.

Which of the following claims about the thermodynamic favorability of a reaction involving these species under standard conditions is correctly justified?

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