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2. The following reaction takes place in a galvanic cell: 2Al(s) + 3Cu² (aq) → 2Al(aq) + 2Cu(s)
Cu²+ (aq) + 2 e →→ Cu(s)
Al³+ (aq) + 3 e→→ Al(s)
E° = +0.34 V
Eº = -1.66 V
a) Write the half-reaction for this overall reaction.
Oxidation:
Reduction:
b) Calculate the standard cell potential Eºcell.
c) Calculate the standard free energy AGº.
d) Calculate the cell potential Ecell at 298 K when [Cu²+] = 3.5 M and [Al³+] = 0.0025M

2 The following reaction takes place in a galvanic cell 2Als 3Cu aq 2Alaq 2Cus Cu aq 2 e Cus Al aq 3 e Als E 034 V Eº 166 V a Write the halfreaction for this ov class=

Respuesta :

The  standard cell potential is obtained from the equation of the reaction.

What is the  standard cell potential?

The  standard cell potential is obtained from the equation of the reaction. Now we have the overall cell equation as from the half reactions as;

Oxidation half reaction;

Al(s) --->Al³+ (aq) + 3 e

Reduction half equation;

Cu²+ (aq) + 2 e →→ Cu(s)

Standard cell potential Eºcell = 0.34V - (-1.66 V) = 2 V

Now;

ΔG = -nFEcell

ΔG = -(2 * 6 * 96500 * 2)

ΔG = -2316kJ

E = 2 - 0.0592/6 log [0.0025]/[3.5 M]

E = 2 + 0.031

E = 2.031 V

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