Explain the half-reactions and the respective standard
Chemistry
Based on the half-reactions and their respective standard reduction potentials
below, which addition to an aqueous solution containing Fe(NO3)2 will result
in a reaction under standard-state conditions?
O2(g) + 4 H+ +4 e- ? 2 H2O(l) 1.23 V
Fe3+(aq) + e- ? Fe2+(aq) 0.77 V
Cu2+(aq) + 2 e- ? Cu(s) 0.34 V
2 H+(aq) + 2 e- ? H2(g) 0.00 V
Ni2+(aq) + + 2 e- ? Ni(s) -0.26 V
Fe2+(aq) + 2 e- ? Fe(s) -0.45 V
A) aqueous copper(II) acetate
B) hydrogen gas
C) nickel wire
D) oxygen gas
A galvanic cell consists of a Ni2+/Ni half-cell and a standard hydrogen
electrode. If the Ni2+/Ni half-cell standard cell functions as the anode, and
the standard cell potential is 0.26 V, what is the standard reduction
potential for the Ni2+/Ni half-cell?
A) +0.26 V
B) -0.26 V
C) +0.13 V
D) -0.13 V
