Voltaic Cell Redox Reaction Quiz

In a voltaic cell, what type of reaction occurs at the anode?

• Reduction

• Oxidation

• Neutralization

• Precipitation

Which component of a voltaic cell allows ions to move between the two half-cells while preventing mixing of the different solutions?

• Battery

• Salt bridge

• Electrode

• Wire

In the redox reaction Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s), which species is oxidized?

• Zn

• Cu²⁺

• Zn²⁺

• Cu

For the reaction 2H₂O(l) + 2e⁻ → H₂(g) + 2OH⁻(aq), which substance is being reduced?

• H₂O

• OH⁻

• H₂

• e⁻

In the redox reaction Cl₂(g) + 2Br⁻(aq) → 2Cl⁻(aq) + Br₂(l), which species is the oxidizing agent?

• Cl₂

• Br⁻

• Cl⁻

• Br₂

Which half-reaction occurs at the cathode in a voltaic cell?

• Oxidation

• Reduction

• Hydrolysis

• Precipitation

In the voltaic cell reaction Fe³⁺(aq) + 3e⁻ → Fe(s), what is the role of Fe³⁺ in the reaction?

• It is reduced

• It is oxidized

• It acts as a spectator ion

• It acts as a catalyst

When constructing a voltaic cell with the following half-reactions: Zn(s) → Zn²⁺(aq) + 2e⁻ and Cu²⁺(aq) + 2e⁻ → Cu(s), which half-reaction occurs at the anode?

• Zn(s) → Zn²⁺(aq) + 2e⁻

• Cu²⁺(aq) + 2e⁻ → Cu(s)

• Both occur at the anode

• Neither occurs at the anode

In the redox reaction 2MnO₄⁻(aq) + 16H⁺(aq) + 10e⁻ → 2Mn²⁺(aq) + 8H₂O(l), which species is the reducing agent?

• MnO₄⁻

• H⁺

• Mn²⁺

• H₂O

If the cell potential for the voltaic cell Zn(s) | Zn²⁺(aq) || Cu²⁺(aq) | Cu(s) is positive, what does this imply about the spontaneity of the reaction?

• The reaction is non-spontaneous

• The reaction is at equilibrium

• The reaction is spontaneous

• The reaction is endothermic