A voltaic cell similar to those shown in your text is constructed.One electrode

Question

A voltaic cell similar to those shown in your text is constructed.One electrode compartment consists of a zinc strip placed in asolution of Zn(NO3)2, and the other has a nickel strip placed in asolution of NiCl2. The overall cell reaction is: Zn (s) + Ni2+(aq) Zn2+ (aq) + Ni (s).
A.) Write the half- reactions that occur in the two electrodecompartments. B.) Which electrode is the anode and which is thecathode? C.) Indicate the signs of the electrodes. D.) Do the electrons flow from the Zinc electrode to thenickel electrode or from the nickel to the zinc? E.) In which direction do the cations and the anions migratethrough the solution.
A.) Write the half- reactions that occur in the two electrodecompartments. B.) Which electrode is the anode and which is thecathode? C.) Indicate the signs of the electrodes. D.) Do the electrons flow from the Zinc electrode to thenickel electrode or from the nickel to the zinc? E.) In which direction do the cations and the anions migratethrough the solution.

Explanation / Answer

Zn (s) + Ni2+ (aq) Zn2+ (aq) + Ni (s).
A)the half- reactions that occur in the two electrodecompartments are Zn (s) Zn2+(aq)          Ni2+ (aq) Ni (s).
B) Zn2+ +2?e ? Zn(s) -0.7618 Ni2+ +2?e ? Ni(s) -0.25 Znic has a greater tendency to loose electrons when compared toNi(observe the values) Zn/Zn2+ electrode is anode   n    Ni2+/Ni electrode is cathod. C.) the signs of the electrodes are [Zn/Zn2+ ]-   n       [ Ni2+/Ni]+ D.) the electrons flow from the Zinc electrode to the nickelelectrode . E.) Zn ions migrate from electrode to solution.Ni ions tend tomigrate towards Ni metal electrode. Cl- ions migrate towards salt bridge orporous membrane, D.) the electrons flow from the Zinc electrode to the nickelelectrode . E.) Zn ions migrate from electrode to solution.Ni ions tend tomigrate towards Ni metal electrode. Cl- ions migrate towards salt bridge orporous membrane, D.) the electrons flow from the Zinc electrode to the nickelelectrode . E.) Zn ions migrate from electrode to solution.Ni ions tend tomigrate towards Ni metal electrode. Cl- ions migrate towards salt bridge orporous membrane, Zn2+ +2?e ? Zn(s) -0.7618

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