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Lesson 1: Galvanic Cells, Standard Hydrogen Electrode and Electrochemical Series — Picture questions (exam style)

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  • Questions count: 4
  • Passing grade: 60%
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1.
The table gives standard reduction potentials of four hypothetical elements. Which option is correct?
The table gives standard reduction potentials of four hypothetical elements. Which option is correct?
cell (X|Xn+ ∥ Wm+|W) is galvanic, emf = +1.60 V
cell (W|Wm+ ∥ Zn+|Z) is galvanic, emf = +1.24 V
cell (Z|Zm+ ∥ Xn+|X) is galvanic, emf = +1.96 V
cell (Y|Yn+ ∥ Wm+|W) is galvanic, emf = +1.05 V
2.
Three hypothetical elements and their reduction potentials are tabulated. Which option is correct?
Three hypothetical elements and their reduction potentials are tabulated. Which option is correct?
strongest reducing agent: X, element that displaces neither of the others: X
strongest reducing agent: Y, element that displaces neither of the others: Y
strongest reducing agent: Z, element that displaces neither of the others: Z
strongest reducing agent: X, element that displaces neither of the others: Z
3.
A Sn/Sn2+ (1 M) half-cell is joined to the standard hydrogen electrode as shown; the voltmeter reads 0.14 V and the Sn electrode is negative. What is E° for Sn?
A Sn/Sn²⁺ (1 M) half-cell is joined to the standard hydrogen electrode as shown; the voltmeter reads 0.14 V and the Sn electrode is negative. What is E° for Sn?
-0.14 V
0.00 V
-0.07 V
+0.14 V
4.
Calculate ΔG° (kJ mol−1) for the cell reaction shown (F = 96 500 C mol−1).
Calculate ΔG° (kJ mol⁻¹) for the cell reaction shown (F = 96 500 C mol⁻¹).
-430.4 kJ/mol
430.4 kJ/mol
-215.2 kJ/mol
-107.6 kJ/mol
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