Santiago Schmidt

02/08/2024 · Elementary School

What are the half-reactions for a galvanic cell with aluminum and gold electrodes? \[ \begin{array}{l}\text { A. } \mathrm{Al}^{3+}(a q)+3 \mathrm{e}^{-} \rightarrow \mathrm{Al}(s) \text { and } \mathrm{Au}^{+}(a q)+\mathrm{e}^{-} \rightarrow \mathrm{Au}(s) \\ \text { B. } \mathrm{Al}^{-}(s) \rightarrow \mathrm{Al}^{3+}(a q)+3 e^{-} \text {and } \mathrm{Au}(s) \rightarrow \mathrm{Au}^{+}(a q)+\mathrm{e}^{-} \\ \text {C. } \mathrm{Al}^{3+}(a q)+3 \mathrm{e}^{-} \rightarrow \mathrm{Al}(s) \text { and } \mathrm{Au}(s) \rightarrow \mathrm{Au}^{+}(a q)+\mathrm{e}^{-} \\ \text {D. } \mathrm{Al}^{-}(s) \rightarrow \mathrm{Al}^{3+}(a q)+3 \mathrm{e}^{-} \text {and } \mathrm{Au}^{+}(a q)+\mathrm{e}^{-} \rightarrow \mathrm{Au}(s)\end{array} \]