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Gaokao Chemistry Practice Question

6. 能正确表示下列反应的离子方程式为( )

  1. A.硫化亚铁溶于稀硝酸中: $\mathrm{FeS}+2 \mathrm{H}^{+}=\mathrm{Fe}^{2+}+\mathrm{H}_{2} \mathrm{~S} \uparrow$
  2. B.$\mathrm{NH}_{4} \mathrm{HCO}_{3}$ 溶于过量的 $\mathrm{NaOH}$ 溶液中: $\mathrm{HCO}_{3}{ }^{-}+\mathrm{OH}^{-}=\mathrm{CO}_{3}{ }^{2-}+\mathrm{H}_{2} \mathrm{O}$
  3. C.少量 $\mathrm{SO}_{2}$ 通入苯酚钠溶液中: $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}^{-}+\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{O}=\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}+\mathrm{HSO}_{3}$
  4. D.大理石溶于醋酸中: $\mathrm{CaCO}_{3}+2 \mathrm{CH}_{3} \mathrm{COOH}=\mathrm{Ca}^{2+}+2 \mathrm{CH}_{3} \mathrm{COO}^{-}+\mathrm{CO}_{2} \uparrow+\mathrm{H}_{2} \mathrm{O}$

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