A.\(\rm{25℃}\)时,等体积、等浓度的\(\rm{NaX}\)和弱酸\(\rm{HX}\)混合后的溶液中:\(\rm{c(Na}\)\(\rm{{\,\!}^{+}}\)\(\rm{) > c(HX) > c(X}\)\(\rm{{\,\!}^{-}}\)\(\rm{) > c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{) > c(OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{)}\) |
B.常温下,\(\rm{pH≈5.5}\)的\(\rm{0.1mol·L^{-1}NaHC_{2}O_{4}}\)溶液:\(\rm{c(Na}\)\(\rm{{\,\!}^{+}}\)\(\rm{) > c(HC}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{4}^{-}}\)\(\rm{) > c(H}\)\(\rm{{\,\!}_{2}}\)\(\rm{C}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{4}}\)\(\rm{) > c(C}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{4}^{2-}}\)\(\rm{)}\) |
C.\(\rm{0.1mol/LNaHS}\)溶液:\(\rm{c(OH^{-})+c(S^{2-})=c(H^{+}) + c(H_{2}S)}\) |
D.室温下,向\(\rm{0.1mol/LNH_{4}HSO_{4}}\)溶液中滴加\(\rm{NaOH}\)溶液至中性:\(\rm{c(Na}\)\(\rm{{\,\!}^{+}}\)\(\rm{) > c(SO}\)\(\rm{{\,\!}_{4}^{2-}}\)\(\rm{) > c(NH}\)\(\rm{{\,\!}_{4}^{+}}\)\(\rm{) > c(OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{)=c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{)}\) |