217-- Regarding the electrochemical cell of aluminum -- manganese, which leads to energy production, which of the following statements is correct? $$\mathrm{E^\circ(Al^{3+}/Al) = -1.66\,V,\quad E^\circ(Mn^{2+}/Mn) = -1.18\,V}$$
In the balanced equation of its reaction, a total of 6 electrons are exchanged.
The rate of change of ion concentrations of aluminum and manganese, during the reaction, are equal to each other.
During the reaction, electrons move through the external circuit from anode to cathode, and the cathode is negatively charged.
Solutions of manganese(II) sulfates and aluminum sulfates can participate in the half-reactions of cathode and anode, respectively.
(1) four (2) three (3) two (4) one
\textbf{217--} Regarding the electrochemical cell of aluminum -- manganese, which leads to energy production, which of the following statements is correct?
$$\mathrm{E^\circ(Al^{3+}/Al) = -1.66\,V,\quad E^\circ(Mn^{2+}/Mn) = -1.18\,V}$$
\begin{itemize}
\item In the balanced equation of its reaction, a total of 6 electrons are exchanged.
\item The rate of change of ion concentrations of aluminum and manganese, during the reaction, are equal to each other.
\item During the reaction, electrons move through the external circuit from anode to cathode, and the cathode is negatively charged.
\item Solutions of manganese(II) sulfates and aluminum sulfates can participate in the half-reactions of cathode and anode, respectively.
\end{itemize}
(1) four \hfill (2) three \hfill (3) two \hfill (4) one