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Gaokao Chemistry Practice Question

实验室进行粗盐提纯时, 需除去 $\mathrm{Ca}^{2+} $、$ \mathrm{Mg}^{2+}$ 和 $\mathrm{SO}_{4}^{2-}$, 所用试剂包括 $\mathrm{BaCl}_{2}$ 以及

  1. A.$\mathrm{Na}_{2} \mathrm{CO}_{3} $、$ \mathrm{NaOH} $、$ \mathrm{HCl}$
  2. B.$\mathrm{Na}_{2} \mathrm{CO}_{3} $、$ \mathrm{HCl} $、$ \mathrm{KOH}$
  3. C.$\mathrm{K}_{2} \mathrm{CO}_{3} $、$ \mathrm{HNO}_{3} $、$ \mathrm{NaOH}$
  4. D.$\mathrm{Na}_{2} \mathrm{CO}_{3} $、$ \mathrm{NaOH} $、$ \mathrm{HNO}_{3}$

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