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A concentration cell is established based on the half reaction Hf4+(aq) + 4e- ⟶ Hf(s) where...

A concentration cell is established based on the half reaction Hf4+(aq) + 4e- ⟶ Hf(s) where the [Hf4+] in the two half-cells are 0.95 and 0.15 M at 25.0 °C. What is the Ecell, in volts, and what is the [Hf4+] in the anode half-cell?

a) -0.012 V; 0.95 M
b) -0.012 V; 0.15 M
c) No
d) 0.012 V; 0.95 M
e) 0.012 V; 0.15 M place
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