Question

In: Chemistry

2. Which of the following pairs of reactants will result in a spontaneous reaction at 25°C....

2. Which of the following pairs of reactants will result in a spontaneous reaction at 25°C. (select all that are spontaneous)

Pb2+(aq) + 2e- → Pb (s)    Eºcell= -0.13V
Cu+(aq) + e- → Cu (s)      Eºcell= +0.52
Ag+(aq)+ e- → Ag (s)       Eºcell= +0.80
Br2 (l)+ 2e- → 2 Br- (aq)   Eºcell= +1.09
Li+(aq) + e- → Li (s)         Eºcell= -3.04
Al 3+(aq)+ 3e- → Al (s)     Eºcell= -1.66
Fe3+(aq) + 3e- → Fe (s)    Eºcell= -0.036
Ni2+(aq) + 2e- → Ni (s)     Eºcell= -0.23

A)

Al3+(aq) + Li (s)

B)

Pb2+(aq) + Cu(s)

C)

Ag+(aq) + Br⁻(aq)

D)

Fe3+(aq) + Ni(s)

3.

Order the following in order of increasing reducing agent strength (1=weakest; 4=strongest)

:

1234
Cu2+(aq) + e- → Cu+ (s) Eºcell= +0.16 V

1234
Cr 3+(aq)+ 3e- → Cr (s) Eºcell= -0.73 V

1234
Fe 2+(aq)+ 2e- → Fe (s) Eºcell= -0.45 V

1234
Pb2+(aq) + 2e- → Pb (s) Eºcell= +0.13 V

Solutions

Expert Solution

queen_honey_blossom answered 2 years ago
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