For questions 18-20 consider the following standard reduction potentials: Cu2 +

Question

For questions 18-20 consider the following standard reduction potentials: Cu2 + (aq) + 2e rightarrow Cu(s) E degree = + 0.34 V Sn4 + (aq) + 2e- rightarrow Sn2 + (aq) E degree = + 0.15 V Pb2 + (aq) + 2e- rightarrow Pb(s) E degree = -0.13 V Fe2 + (aq) + 2e- rightarrow Fe(s) E degree = -0.44 V Cr3 + (aq) + 3e- rightarrow Cr(s) E degree= -0.74 V What is the standard cell potential (E degrease) for the voltaic cell based on the reaction below is 2Cr (s) + 3Fe2 + (aq) rightarrow 3Fe (s) + 2Cr3 + (aq) + 0.30 + 2.80 + 3.10 + 0.83 -0.16 Calculate DeltaG degree for the electrochemical cell Fe(s) | Fe2 + (aq) || Sn4 + (aq) | Sn2 + (aq) | Pt(s) -5.5 Times 101 kJ/mol 1.1 degree 105 kJ/mol -1.1 Times 102 kJ/mol 1.2 Times 102 kJ/mol 6.0 Times 101 kJ/mol Which of the following would be reduced by Pb2 + (aq)? Fe2 + (aq) Sn4 + (aq) Fe(s) Cr(s) None of the above

Explanation / Answer

Standard cell potential

E

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