A.向稀盐酸中加入少量钠粒:\(\rm{2Na+2H_{2}}\)\(\rm{O=2Na}\)\(\rm{{\,\!}^{+}}\)\(\rm{+2OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{+H}\)\(\rm{{\,\!}_{2}}\)\(\rm{↑}\) |
B.\(\rm{NaHSO_{4}}\)溶液与\(\rm{Ba(OH)}\)\(\rm{{\,\!}_{2}}\)溶液混合呈中性: \(\rm{2H}\)\(\rm{{\,\!}^{+}}\)\(\rm{+SO}\)\(\rm{{\,\!}_{4}^{2-}}\)\(\rm{+Ba}\)\(\rm{{\,\!}^{2+}}\)\(\rm{+2OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{=BaSO}\)\(\rm{{\,\!}_{4}}\) \(\rm{+2H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\) |
C.用漂白粉溶液吸收尾气中\(\rm{SO_{2}}\): \(\rm{Ca}\)\(\rm{{\,\!}^{2+}}\)\(\rm{+2ClO}\)\(\rm{{\,\!}^{-}}\)\(\rm{+SO}\)\(\rm{{\,\!}_{2}}\)\(\rm{+H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O=CaSO}\)\(\rm{{\,\!}_{3}}\) \(\rm{+2HClO}\) |
D.水玻璃中通入过量氧化碳:\(\rm{Na_{2}}\)\(\rm{SiO}\)\(\rm{{\,\!}_{3}}\)\(\rm{+CO}\)\(\rm{{\,\!}_{2}}\)\(\rm{+H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O=2Na}\)\(\rm{{\,\!}^{+}}\)\(\rm{+CO}\)\(\rm{{\,\!}_{3}^{2-}}\)\(\rm{+H}\)\(\rm{{\,\!}_{2}}\)\(\rm{SiO}\)\(\rm{{\,\!}_{3}}\)\(\rm{↓}\) |