Question

For a galvanic cell that uses the following two half-reactions,
Cr2O72-(aq) + 14 H+(aq) + 6 e- -> 2 Cr3+(aq) + 7 H2O(l)
Pb(s) -> Pb2+(aq) + 2 e-
how many moles of Pb(s) are oxidized by one mole of Cr2O72-?
A) 1
B) 2
C) 3
D) 6

Answer

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