A.断开\(\rm{K_{2}}\),闭合\(\rm{K_{1}}\)时,总反应的离子方程式为:\(\rm{2H}\)\(\rm{{\,\!}^{+}}\)\(\rm{+2Cl}\)\(\rm{{\,\!}^{-}\overset{通电}{=\!=\!=\!=\!=}}\)\(\rm{Cl}\)\(\rm{{\,\!}_{2}}\)\(\rm{↑+H}\)\(\rm{{\,\!}_{2}}\)\(\rm{↑}\) |
B.断开\(\rm{K_{2}}\),闭合\(\rm{K_{1}}\)时,石墨电极附近溶液变红 |
C.断开\(\rm{K_{1}}\),闭合\(\rm{K_{2}}\)时,铜电极上的电极反应式为: \(\rm{Cl}\)\(\rm{{\,\!}_{2}}\)\(\rm{+2e}\)\(\rm{{\,\!}^{-}}\)\(\rm{═2Cl}\)\(\rm{{\,\!}^{-}}\) |
D.断开\(\rm{K_{1}}\),闭合\(\rm{K_{2}}\)时,石墨电极作正极 |