Question

In: Chemistry

1) Using the reduction potentials table in the notes/book, what is the standard cell potential for...

1) Using the reduction potentials table in the notes/book, what is the standard cell potential for the following electrochemical cell:

Al(s) | Al³⁺(aq) || Ni²⁺(aq) | Ni(s)

2) Using the standard reduction potentials table in your book/notes, what is the standard change in gibbs free energy for the following reaction in kJ?

2NO₃^-(aq) + 8H⁺(aq) + 3Cu(s) → 3Cu²⁺(aq) + 2NO(g) + 4H₂O(l)

3) A voltaic cell is set-up with a silver electrode in a silver nitrate solution and a nickel electrode in a nickel (II) nitrate solution. What is the reaction occuring at the anode? Use the reduction potentials table in the notes/book.

Expert Solution

1) E^0 CELL = E^0 (Ni^+2 /Ni) - E^0 (Al^+3/Al)

= -0.23-(-1.66)

=1.43V

2)

E^0 CELL = E^0 (NO3^-1 /NO) - E^0 (Cu^+2/Cu)

= 0.96-(0.34)

= 0.62V

DG = -nF E^0 CELL

= -(2*96500*0.62)

= -119660 J

= -119.66kJ

3) THE ELECTRODE WHICH HAS LOWER REDUCTION POTENTIAL THAT CAN BE ACTS AS A ANODE

THERFOER NICKEL ELECTRODE HAS LOWER REDCTION POTENTIAL THA SILVER.HENCE THE REACTION AT ANODE IS

Ni(s) -------------------------> Ni^+2 (aq)

queen_honey_blossom answered 1 hour ago

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