Science Homework Help

Consider the given half‑reactions that occur at the cathode and anode in an electrolysis reaction at $T=298\text{K.}$

$$\text{cathode:}{\text{Al}}^{3+}(\text{aq},0.20\text{M})+3{\text{e}}^{-}\stackrel{-\rightharpoonup }{\leftharpoondown -}\text{Al}\left(\text{s}\right)$$

$$\text{anode:}\text{Au}\left(\text{s}\right)\stackrel{-\rightharpoonup }{\leftharpoondown -}{\text{Au}}^{3+}(\text{aq},0.21\text{M})+3{\text{e}}^{-}$$

Standard reduction potentials can be found in the table of standard reduction potentials.

What voltage must be applied to drive the net reaction if current is negligible?

$E_{\text{cell}}=$

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