A.\(\rm{0.1 mol·L^{-1}NaHCO_{3}}\)溶液:\(\rm{c(Na^{+}) > c(HCO\rlap{_{3}}{^{-}}) > c(CO\rlap{_{3}}{^{2-}}) > c(H_{2}CO_{3})}\) |
B.\(\rm{0.1 mol·L^{-1}NaOH}\)溶液中通入\(\rm{SO_{2}}\)气体至\(\rm{pH=7}\):\(\rm{c(Na^{+})=c(HSO\rlap{_{3}}{^{-}})+2c(SO\rlap{_{3}}{^{2-}})+c(H_{2}SO_{3})}\) |
C.等物质的量浓度的\(\rm{CH_{3}COOH}\)溶液与\(\rm{NaOH}\)溶液等体积混合后所得\(\rm{pH=9}\)的溶液:\(\rm{c(OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{)-c(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{COOH)=c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{)=1×10}\)\(\rm{{\,\!}^{-9}}\) \(\rm{mol·L}\)\(\rm{{\,\!}^{-1}}\) |
D.\(\rm{20 mL 0.1 mol·L^{-1}CH_{3}COONa}\)溶液与\(\rm{10 mL 0.1 mol·L^{-1}HCl}\)溶液混合得到的溶液:\(\rm{c(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{COOH)+2c(H}\)\(\rm{{\,\!}^{+}}\)\(\rm{)=c(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{COO}\)\(\rm{{\,\!}^{-}}\)\(\rm{)+2c(OH}\)\(\rm{{\,\!}^{-}}\)\(\rm{)}\) |