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AP Chemistry
9.9 Cell Potential and Free Energy
9.8 Galvanic (Voltaic) and Electrolytic Cells
AdvancedMCQMathematicalConceptualExperimental14.4k
Strips of four different unknown metals, \(W\text{(s)}\), \(X\text{(s)}\), \(Y\text{(s)}\), and \(Z\text{(s)}\), were cleaned and placed into separate test tubes containing \(1.0 \text{ M}\) aqueous nitrate solutions of each metal ion at \(298 \text{ K}\). The observations are recorded in the table below.

Metal strip\(W^{2+}\text{(aq)}\)\(X^{2+}\text{(aq)}\)\(Y^{2+}\text{(aq)}\)\(Z^{2+}\text{(aq)}\)
\(W\text{(s)}\)—ReactionReactionReaction
\(X\text{(s)}\)No reaction—No reactionReaction
\(Y\text{(s)}\)No reactionReaction—Reaction
\(Z\text{(s)}\)No reactionNo reactionNo reaction—

Based on the experimental data, which of the following correctly ranks the metal ions from weakest to strongest oxidizing agent and identifies the electrodes of a standard galvanic cell constructed from these half-cells that will produce the greatest positive cell potential, \(E^\circ_{\text{cell}}\)?

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