Question

1) For a galvanic cell that uses the following two half-reactions, Cr2O72-(aq) + 14 H+(aq) +...

1) 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) 6

B) 2

C) 1

D) 3

2) What species is oxidized in the reaction: CuSO4(aq) + Mg(s) →MgSO4(aq) + Cu(s)?

A) MgSO4 (aq)

B ) M g (s)

C ) C u S O 4 (aq)

D ) C

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