A.\(\rm{0.1 mol·L^{-1} (NH_{4})_{2}Fe(SO_{4})_{2}}\)溶液中:\(\rm{c(SO_{4}^{2-}) > c(NH_{4}^{+}) > c(Fe^{2+}) > c(H^{+})}\) |
B.\(\rm{pH=11}\)的氨水和\(\rm{pH=3}\)的盐酸溶液等体积混合,所得溶液中:\(\rm{c(Cl}\)\(\rm{{\,\!}^{-}}\)\(\rm{) > c(NH}\)\(\rm{{\,\!}_{4}^{+}}\)\(\rm{) > c(OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{) > c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{)}\) |
C.在\(\rm{0.1 mol·L^{-1} Na_{2}CO_{3}}\)溶液中:\(\rm{2c(Na^{+})=c(CO\rlap{_{3}}{^{2-}})+c(HCO\rlap{_{3}}{^{-}})+c(H_{2}CO_{3})}\) |
D.\(\rm{0.1 mol·L^{-1}}\)的醋酸钠溶液\(\rm{20 mL}\)与\(\rm{0.1 mol·L^{-1}}\)盐酸\(\rm{10 mL}\)混合后溶液显酸性:\(\rm{c(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{COO}\)\(\rm{{\,\!}^{-}}\)\(\rm{) > c(Cl}\)\(\rm{{\,\!}^{-}}\)\(\rm{) > c(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{COOH) > c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{)}\) |