选项 | 离子组 | 试剂\(\rm{X}\) | 离子方程式 |
\(\rm{A}\) | \(\rm{Fe^{3+}}\)、\(\rm{Al^{3+}}\)、\(\rm{SiO\rlap{_{3}}{^{2-}}}\)、\(\rm{NO\rlap{_{3}}{^{-}}}\) | 过量的盐酸 | \(\rm{SiO\rlap{_{3}}{^{2-}}+2H^{+}=H_{2}SiO_{3}↓}\) |
\(\rm{B}\) | 透明溶液中:\(\rm{Fe^{3+}}\)、\(\rm{NH\rlap{_{4}}{^{+}}}\)、\(\rm{SO\rlap{_{4}}{^{2-}}}\)、\(\rm{Cl^{-}}\) | 过量的铜粉 | \(\rm{2Fe^{3+}+Cu=2Fe^{2+}+Cu^{2+}}\) |
\(\rm{C}\) | \(\rm{Na^{+}}\)、\(\rm{Ba^{2+}}\)、\(\rm{Cl^{-}}\)、\(\rm{HCO\rlap{_{3}}{^{-}}}\) | \(\rm{NaHSO_{4}}\)溶液 | \(\rm{H^{+}+HCO\rlap{_{3}}{^{-}}=CO_{2}↑+H_{2}O}\) |
\(\rm{D}\) | \(\rm{pH=1}\)的溶液中:\(\rm{Mg^{2+}}\)、\(\rm{Fe^{2+}}\)、\(\rm{NO\rlap{_{3}}{^{-}}}\)、\(\rm{SO\rlap{_{4}}{^{2-}}}\) | 双氧水 | \(\rm{2Fe^{2+}+H_{2}O_{2}+2H^{+}=2Fe^{3+}+2H_{2}O}\) |