20. Electrochemistry
Cell Potential: Standard
25PRACTICE PROBLEM
At 25°C, which of the following pairs would you predict to react spontaneously?
Ba2+(aq) + 2e- → Ba(s) E° = -2.90 V
Sn4+(aq) + 2e- → Sn2+(aq) E° = 0.15 V
Mg2+(aq) + 2e- → Mg(s) E° = -2.37 V
Zn2+(aq) + 2e- → Zn(s) E° = -0.73 V
Na+(aq) + e- → Na(s) E° = -2.71 V
Fe3+(aq) + 3e- → Fe(s) E° = -0.036 V
Cr3+(aq) + 3e- → Cr(s) E° = -0.73 V
Ni2+(aq) + 2e- → Ni(s) E° = -0.23 V
At 25°C, which of the following pairs would you predict to react spontaneously?
Ba2+(aq) + 2e- → Ba(s) E° = -2.90 V
Sn4+(aq) + 2e- → Sn2+(aq) E° = 0.15 V
Mg2+(aq) + 2e- → Mg(s) E° = -2.37 V
Zn2+(aq) + 2e- → Zn(s) E° = -0.73 V
Na+(aq) + e- → Na(s) E° = -2.71 V
Fe3+(aq) + 3e- → Fe(s) E° = -0.036 V
Cr3+(aq) + 3e- → Cr(s) E° = -0.73 V
Ni2+(aq) + 2e- → Ni(s) E° = -0.23 V