Two galvanic cells were constructed under standard conditions in an experiment to determine the relative positions in the electrochemical series of the standard electrode potential, $E^\circ$, for the following reactions. Both cells generate a potential difference. 1. Ag(NH$_3$)$_2^+$(aq) + e$^- \rightarrow$ Ag(s) + 2NH$_3$(aq) $E_1$ 2. Ag$(s) \rightarrow$ Ag$^+$(aq) + e$^- $E_2$ 3. Ag(CN)$_2^-$ + e$^- \rightarrow$ Ag(s) + 2CN$^-$ $E_3$ The values of the electrode potentials in order from highest to lowest would be: A. $E_1$, $E_2$, $E_3$ B. $E_2$, $E_1$, $E_3$ C. $E_3$, $E_1$, $E_2$ D. $E_1$, $E_3$, $E_2$

SSCE VCE Chemistry Redox Reactions: Two galvanic cells were construc

Two galvanic cells were constructed under standard conditions in an experiment to determine the relative positions in the electrochemical series of the standard electrode potential, $E^\circ$, for the following reactions - VCE - SSCE Chemistry - Question 10 - 2011 - Paper 1

Question 10

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Two galvanic cells were constructed under standard conditions in an experiment to determine the relative positions in the electrochemical series of the standard elec... show full transcript

Worked Solution & Example Answer:Two galvanic cells were constructed under standard conditions in an experiment to determine the relative positions in the electrochemical series of the standard electrode potential, $E^\circ$, for the following reactions - VCE - SSCE Chemistry - Question 10 - 2011 - Paper 1

Step 1

Determine the standard electrode potentials

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Answer

To solve this problem, we need to analyze the given half-reactions to understand their standard electrode potentials relative to each other. The more positive the electrode potential, the stronger the oxidizing agent. Here are the half-reactions:

Ag(NH $_3$ ) $_2^+ + e^- \rightarrow$ Ag + 2NH $_3$ (This is an oxidation reaction with a higher potential)
Ag(s) $\rightarrow$ Ag $^+ + e^-$ (A standard reference used in this context)
Ag(CN) $_2^- + e^- \rightarrow$ Ag + 2CN $^-$ (This half-reaction will be compared against the others)

Based on the standard electrode potentials often known or provided in reference tables, we conclude the following relationship among them.

Step 2

Rank the electrode potentials

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Answer

From the analysis, the order from highest to lowest electrode potential is:

$E_3$ > $E_1$ > $E_2$ . So, we find that option C ( $E_3$ , $E_1$ , $E_2$ ) is the correct answer.

Two galvanic cells were constructed under standard conditions in an experiment to determine the relative positions in the electrochemical series of the standard electrode potential, $E^\circ$, for the following reactions - VCE - SSCE Chemistry - Question 10 - 2011 - Paper 1

Determine the standard electrode potentials

Rank the electrode potentials

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