Tutorial: Electrochemistry

Tutorial

Electrochemistry

1.		Given below are the std reduction potentials of silver ion and iron (II) ions. Ag+(aq)   +   e   ®   Ag(s)          E° = +0.80 V Fe2+(aq)   +   2e   ®   Fe(s)         E° = -0.44 V
2.		Given the following standard reduction potentials Zn2+(aq)   +   2e   ®   Zn(s)          E° = - 0.76 V Fe3+(aq)   +   e   ®   Fe2+(aq)          E° = +0.77 V Will Zn reduced Fe3+ ion to Fe2+ ions?
3.		Given 2 half – equations Ni2+(aq)   +   2e   ⇌   Ni(s)          E° = -0.25 V Cr3+(aq)   +   3e   ⇌   Cr(s)         E° = -0.74 V Calculate the cell potential when [Ni2+] = 1x10-3 M and [Cr3+] = 2.0 x 10-3 M
4.		Determine the anode and cathode and write the half cell reaction for the following electrochemical cell. Cu(s)   +   2Ag+(aq)   ®   Cu2+(aq)   +   2Ag(s)
5.		Write the cell diagram for the following voltaic cell 2 Ag+(aq)   +   Cd(s)   ®   Cd2+(aq)   +   2 Ag(s)
6.		Calculate E°cell of the following electrochemical cell and determine whether the reaction is spontaneous or non spontaneous Br2(g)   +   2LiF(aq)   ®   F2(g)   +   2LiBr(aq) Given: E° Li+/Li = -3.03 V ; E°Br2/Br- = +1.07 V  ; E° F2/F- = +2.87 V