Exam 14: Oxidation-Reduction Reactions

Given the following net ionic equation,select the correct pairing of half-reactions. Mg (s)+ Zn²⁺ (aq) $\rightarrow$ Mg²⁺ (aq)+ Zn (s)

What is the oxidation number of sulfur in sulfur trioxide,SO₃?

Which statement is TRUE?

What are the coefficients of the balanced equation that represents the reaction in a magnesium/aluminum electrochemical cell? Mg (s)+ Al³⁺ (aq) $\rightarrow$ Al (s)+ Mg²⁺ (aq)

Given the accompanying partial activity series,which element(s)will react with acid? Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- H₂ $\rightarrow$ 2H⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^- Ag $\rightarrow$ Ag⁺ + e^-

Given the accompanying partial activity series,which element(s)can reduce zinc ion to elemental zinc? Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

What is the oxidation number of nitrogen in the nitrate ion,NO₃^-?

If the accompanying drawing of an electrochemical cell represents an iron-nickel cell,use the partial activity series included to describe the component labeled 2. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

Given the accompanying partial activity series,predict which reaction(s)will occur as written. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

The reduction half-reaction for the reaction of zinc with hydrochloric acid is:

Using the accompanying drawing of an electrochemical cell,identify the components labeled 1,2,and 5,respectively.

Given the accompanying partial activity series,which element(s)can reduce copper(II)to elemental copper? Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

Which example represents the oxidation half-reaction for cobalt/cobalt(II)?

Considering the following net ionic equation: Mg + Fe²⁺ $\rightarrow$ Mg²⁺ + Fe The species that is OXIDIZED is _____,and the OXIDIZING AGENT is _____.

Which pair of half-reactions takes place in a fuel cell?

Considering the following net ionic equation: Mg + Fe²⁺ $\rightarrow$ Mg²⁺ + Fe The species REDUCED is _____,and the REDUCING AGENT is _____.

If the accompanying drawing of an electrochemical cell represents an iron-nickel cell,use the partial activity series included to select the half-reaction represented by the RIGHT side of the cell. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

Given the accompanying partial activity series,predict which element or ion will react with the cobalt ion,Co²⁺. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

Consider an electrochemical cell consisting of zinc and nickel half-cells.Use the partial activity series included to determine the direction in which the electrons in the wire will flow. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

What are the coefficients of the balanced equation that represents the reaction in a magnesium/chromium electrochemical cell? Mg (s)+ Cr³⁺ (aq) $\rightarrow$ Cr (s)+ Mg²⁺ (aq)