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Solution: What is the standard e.m.f. for a voltaic cell based on the ...

Question

What is the standard e.m.f. for a voltaic cell based on the reactions:

Sn4+ (aq) + 2e → Sn2+ (aq)    E ̊red = +0.154 V

Cr3+ (aq) + 3e  → Cr (s)          E ̊red = –0.74 V

 

a) +1.94 V

b) +0.89 V

c) +2.53 V

d) –0.59 V

e) –1.02 V

 

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