Question 1
Using the following standard reduction potentials,
| Fe3+(aq) + e- →Fe2+(aq) | E° = +0.77 V |
| Ni2+(aq) + 2 e- →Ni(s) | E° = -0.23 V |
calculate the standard cell potential for the galvanic cell reaction given below and determine whether or not this reaction is spontaneous under standard conditions.
Ni
2+(
aq) + 2Fe
2+(
aq) → 2Fe
3+(
aq) + Ni(
s)
◦
E° = -1.00 V, spontaneous
◦
E° = -1.00 V, nonspontaneous
◦
E° = +1.00 V, spontaneous
◦
E° = +1.00 V, nonspontaneous
Question 2
Given that
E°
red = -1.66 V for Al
3+/Al at 25 °C, find
E° and
E for the concentration cell expressed using shorthand notation below:
Al(
s) ∣ Al
3+(1.0 × 10
-5 mol L
-1) ∣∣ Al
3+(0.100 mol L
-1) ∣ Al(
s)
◦
E° = -1.66 V and
E = -1.54 V
◦
E° = 0.00 V and
E = +0.0789 V
◦
E° = -1.66 V and
E = -1.42 V
◦
E° = 0.00 V and
E = +0.24 V
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