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

Question

A voltaic cell similar to those shown in your text isconstructed. One electrode compartment consists of a zinc stripplaced in a solution of Zn(NO3)2, and theother has a nickel strip placed in a solution of NiCl2.The overall cell reaction is:Zn(s)+Ni2+(aq)Zn2+(aq)+Ni(s). a. Write the half -reactions that occur in two electrodecompartments. b. Whcih 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 the nickelelectrode or from the nickel to the zinc? e. In which directions do the cations and the anions migratethrough the solution? A voltaic cell similar to those shown in your text isconstructed. One electrode compartment consists of a zinc stripplaced in a solution of Zn(NO3)2, and theother has a nickel strip placed in a solution of NiCl2.The overall cell reaction is:Zn(s)+Ni2+(aq)Zn2+(aq)+Ni(s). a. Write the half -reactions that occur in two electrodecompartments. b. Whcih 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 the nickelelectrode or from the nickel to the zinc? e. In which directions do the cations and the anions migratethrough the solution?

Explanation / Answer

a. Half reations: Zn2+ (aq)+2e- ..............>Zn(s)      E0 = -0.76V                         Ni2+(aq) + 2e- ..............>Ni(s)      E0 = -0.23V b. The electrode with low red ox potential is Anode andthe other one is Cathode.      So Zn is Anode and Ni isCathode. c. Cathode possesses ''-'' and anode posseses''+'' sign d. Electrons will flow from zinc to nickel becauseelectrons released at anode(oxidation). e. In the solution cations moves towards cathode(Ni) andanions moves towards anode(Zn)                         Ni2+(aq) + 2e- ..............>Ni(s)      E0 = -0.23V b. The electrode with low red ox potential is Anode andthe other one is Cathode.      So Zn is Anode and Ni isCathode. c. Cathode possesses ''-'' and anode posseses''+'' sign d. Electrons will flow from zinc to nickel becauseelectrons released at anode(oxidation). e. In the solution cations moves towards cathode(Ni) andanions moves towards anode(Zn)

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