A.\(\rm{0.lmol⋅L^{-l\;}NaHC_{2}O_{4}}\)溶液\(\rm{(pH=5.5)}\):\(\rm{c(Na}\)\(\rm{{\,\!}^{+}}\)\(\rm{) > c( HC}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{4}^{-}}\)\(\rm{) > c(H}\)\(\rm{{\,\!}_{2}}\)\(\rm{C}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{4}}\)\(\rm{) > c(C}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{4}^{2-}}\) \(\rm{)}\) |
B.\(\rm{0.lmol⋅L^{-1\;}NaHS}\) 溶液:\(\rm{C(OH^{-})+c(S^{2-})=c( H^{+})+c(H_{2}S)}\) |
C.\(\rm{0.lmol⋅L^{-1}CH_{3}COOH}\) 溶液和 \(\rm{0.lmol⋅L^{-1}CH_{3}COONa}\) 溶液等体积混合:\(\rm{c(Na+) > c(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{COOH) > c(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{COO}\)\(\rm{{\,\!}^{-}}\)\(\rm{) > c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{) > c( OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{)}\) |
D.\(\rm{0.lmol⋅L^{-l}NH_{4}HSO_{4}}\) 溶液中滴加 \(\rm{0.lmol⋅L^{-1}NaOH}\) 溶液至中性:\(\rm{c(Na}\)\(\rm{{\,\!}^{+}}\) \(\rm{) > c(SO}\)\(\rm{{\,\!}_{4}^{2-}}\) \(\rm{) > c(NH}\)\(\rm{{\,\!}_{4}^{+}}\) \(\rm{) > c(OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{)=c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{)}\) |