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Gaokao Chemistry Practice Question

常温下,下列有关电解质溶液的叙述正确的是

  1. A.在 $0.1 \mathrm{~mol} \cdot \mathrm{L}^{-1} \mathrm{H}_{3} \mathrm{PO}_{4}$ 溶液中 $\mathrm{c}\left(\mathrm{H}_{3} \mathrm{PO}_{4}\right)>\mathrm{c}\left(\mathrm{H}_{2} \mathrm{PO}_{4}^{-}\right)>\mathrm{C}\left(\mathrm{HPO}_{4}^{2-}\right)>\mathrm{c}\left(\mathrm{PO}_{4}^{3-}\right)$
  2. B.在 $0.1 \mathrm{~mol} \cdot \mathrm{L}^{-1} \mathrm{Na}_{2} \mathrm{C}_{2} \mathrm{O}_{4}$ 溶液中 $\mathrm{c}\left(\mathrm{Na}^{+}\right)+\mathrm{c}\left(\mathrm{H}^{+}\right)=\mathrm{c}\left(\mathrm{OH}^{-}\right)+\mathrm{c}\left(\mathrm{HC}_{2} \mathrm{O}_{4}^{-}\right)+\mathrm{c}_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}^{2-}\right)$
  3. C.在 $0.1 \mathrm{~mol} \cdot \mathrm{L}^{-1} \mathrm{NaHCO}_{3}$ 溶液中 $\mathrm{c}\left(\mathrm{H}_{2} \mathrm{CO}_{3}\right)+\mathrm{c}\left(\mathrm{HCO}_{3}^{-}\right)=0.1 \mathrm{~mol} \cdot \mathrm{L}^{-1}$
  4. D.氨水和 $\mathrm{NH}_{4} \mathrm{Cl}$ 溶液混合, 形成 $\mathrm{pH}=9$ 的溶液中 $\mathrm{c}\left(\mathrm{Cl}^{-}\right)>\mathrm{c}\left(\mathrm{NH}_{4}^{+}\right)>\mathrm{c}\left(\mathrm{OH}^{-}\right)>\mathrm{c}\left(\mathrm{H}^{+}\right)$

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