Order Electrochemical Equilibria Questions

Order Electrochemical Equilibria Questions
Order Electrochemical Equilibria Questions

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Electrochemical Equilibria
What is the cell reaction for the following voltaic (galvanic) cell?
Cu(s) | Cu?*(aq) || Fe**(aq), Fe?*(aq) | Pt(s)
Determine the standard electromotive force for the following galvanic
cell reaction.
Cu(s) 2 Fe**(aq) > 2 Fe?*(aq) Cu?*(aq)
The standard electromotive force (E°) for the following galvanic cell
reaction is 0.434 V. Determine the value of the equilibrium constant
(K) for this process at 25°C.
Cu(s) 2 Fe**(aq) > 2 Fe?*(aq) Cu?*(aq)
The standard electromotive force for the following galvanic cell reaction
is 0.434 V. Write the equilibrium constant (K’) expression for this
process at 25°C.
Cu(s) 2 Fe**(aq) > 2 Fe?*(aq) Cu?*(aq)
Determine the cell potential, at 298 K, for the following reaction if
the copper ion concentration is 0.100 M, the iron(II) concentration is
Order Electrochemical Equilibria Questions
0.150 M, and the iron(III) concentration is 0.225 M.
Cu(s) 2 Fe**(aq) > 2 Fe?*(aq) Ci *{aq)
The standard cell potential is E° = 0.434 V.
The following cell reaction occurs under standard conditions.
Cu*(aq) Zn(s) > Cuss) 4- Za” (ac)
31
32 >» McGraw-Hill’s 500 Physical Chemistry Questions
The standard Gibbs free energies of formation for the ions are 65.5 kJ
mol! for Cu?*(aq) and —147.0 kJ mol! for Zn**(aq). What is the
standard cell potential for this reaction?
176. How much copper will deposit on the cathode if a current of 25.0 A passes
through the cell for 1,275 s? The cell reaction is
Cu? (aq) Zn(s) > Culs)’ Zie”(aq)
177. A Galvanic cell contains half-cells involving the following two
half-reactions.
GiO7 (aq) 14 EP agit oe 2 2 Ge” 7 HOW) i= ile We
He*”(aq) her Fe (aq) E° = 40.77 V
Assuming the half-cells are under standard conditions, what is the cell
potential in volts?
178. ‘The standard Gibbs free energy change for the following half-reaction is
AG° =-—65.49 kJ mol™!. Determine the standard electrode potential (E°)
for this half-reaction.
Cu**(aq) 2 © > Cu(s)
179. The electrolysis of a solution of copper(II) sulfate led to the deposition
of 0.1872 g of copper on the cathode. How much electric charge passed
through the solution? The half-reaction was
Cu**(aq) 2

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