Multiple Choice
What is the oxidation number of each underlined element?
a) P4 b) BO33– c) AsO42– d) HSO4–
20. Electrochemistry
Standard Reduction Potentials
Back20. Electrochemistry
Standard Reduction Potentials
- Multiple Choice
In the following reaction identify the oxidizing agent and the reducing agent:
Cr2O72- + 6 Fe2+ + 14 H+ → 2 Cr3+ + 6 Fe3+ + 7 H2O
- Multiple ChoiceIdentify the species that is being oxidized in the following balanced reaction.
3 Pb2+ (aq) + 2 Cr (s) → 3 Pb (s) + 2 Cr3+ (aq)
- Multiple ChoiceWhat is the coefficient of NO when the following redox reaction is balanced in acidic solution?
NO3‾ (aq) + Cu (s) → NO (s) + Cu2+ (aq)
- Multiple ChoiceDetermine the total number of electrons transferred in the following balanced reaction.
4 MnO4– (aq) + 12 H3O+ (aq) → 4 Mn2+ (aq) + 5 O2 (g) + 18 H2O (g)
- Multiple ChoiceIdentify the oxidizing agent in the following balanced reaction.
3 Pb2+ (aq) + 2 Cr (s) → 3 Pb (s) + 2 Cr3+ (aq)
- Multiple Choice
Rank the given metal ions in order of increasing strength as an oxidizing agent.
Pb2+ (-0.13 V), Mn2+ (-1.18 V), Cu2+ (+0.16 V), Co3+ (+1.82 V), Fe3+ (+0.77 V)
- Multiple Choice
Determine which species can oxidize Br2.
- Open Question
Wse the information in the Aleks data tab to sort the following chemical species by oxidizing power.
- Multiple ChoiceWhich of the following represents the balanced equation for the overall redox reaction between Fe³⁺(aq) and Cr(s) based on their standard reduction potentials?
- Multiple ChoiceThe standard potential for the following galvanic cell is +0.90 V: 3 Cu²⁺(aq) + 2 Ga(s) → 3 Cu(s) + 2 Ga³⁺(aq). Given that the standard reduction potential for the Cu²⁺/Cu half-cell is +0.34 V, what is the standard reduction potential for the Ga³⁺/Ga half-cell?
- Multiple ChoiceUse the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C. (The equation is balanced.)Pb(s) + Br2(l) → Pb2+(aq) + 2 Br-(aq)Given the standard reduction potentials:Pb2+(aq) + 2 e- → Pb(s) E° = -0.13 VBr2(l) + 2 e- → 2 Br-(aq) E° = +1.07 VWhat is the standard cell potential (E°cell) for the reaction?
- Multiple ChoiceUse the table of standard reduction potentials to calculate the equilibrium constant at standard temperature (25 °C) for the reaction: Fe(s) + Ni²⁺(aq) → Fe²⁺(aq) + Ni(s). Which of the following is the correct equilibrium constant (K)?
- Multiple ChoiceUsing standard reduction potentials, calculate the standard emf for the following reaction: Co(s) + 2Co³⁺(aq) → 3Co²⁺(aq). What is the standard emf of this reaction?
- Multiple ChoiceWhat is the value (in V) of E°cell for the reaction Cu²⁺ (aq) + Fe (s) → Cu (s) + Fe²⁺ (aq) given the standard reduction potentials: Cu²⁺/Cu = +0.34 V and Fe²⁺/Fe = -0.44 V?