Please help ASAP there is only one correct answer! Standard electrode potentials

Question

Please help ASAP there is only one correct answer!

Standard electrode potentials at 25oC.

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25oC.

Ag+(aq) + Br-(aq)

Li+(aq) + Al(s)

Pb2+(aq) + Cu(s)

Fe3+(aq) + Ni(s)

Reduction Half-Reaction Eo(V) F2(g) + 2e- 2F-(aq) 2.87 MnO4-(aq) + 4H+(aq) + 3e- MnO2(s) + 2H2O(l) 1.68 MnO4-(aq) + 8H+(aq) + 5e- Mn2+(aq) + 4H2O(l) 1.51 ClO2(g) + e- ClO2-(aq) 0.95 Ag+(aq) + e- Ag(s) 0.80 MnO4-(aq) + e- MnO42-(aq) 0.56 Cu2+(aq) + 2e- Cu(s) 0.34 2H+(aq) + 2e- H2(g) 0 Fe3+(aq) + 3e- Fe(s) -0.036 Pb2+(aq) + 2e- Pb(s) -0.13 Sn2+(aq) + 2e- Sn(s) -0.14 Ni2+(aq) + 2e- Ni(s) -0.23 Cd2+(aq) + 2e- Cd(s) -0.40 Fe2+(aq) + 2e- Fe(s) -0.45 Cr3+(aq) + 3e- Cr(s) -0.73 Zn2+(aq) + 2e- Zn(s) -0.76 Mg2+(aq) + 2e- Mg(s) -2.37 Ba2+(aq) + 2e- Ba(s) -2.90

Explanation / Answer

Only those reactions will be spontaneous whose (Eo)value will be positive.

Here we can clearly see that there is only one reaction for which (Eo) is positive and the reaction is given below

Ag+ + Br- - >

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---