Chemistry 0620 · IGCSE · Separation and purification

Separation and purification — practice question

Copper(II) carbonate is produced when aqueous sodium carbonate is mixed with aqueous copper(II) nitrate. The ionic equation for the reaction is given as: $\text{CO}_3^{2-}(aq) + \text{Cu}^{2+}(aq) \rightarrow \text{CuCO}_3(s)$. How can pure copper(II) carbonate be separated from the reaction mixture?

  • Aevaporate $\rightarrow$ filter $\rightarrow$ dry
  • Bevaporate $\rightarrow$ wash $\rightarrow$ crystallise
  • Cfilter $\rightarrow$ evaporate $\rightarrow$ crystallise
  • Dfilter $\rightarrow$ wash $\rightarrow$ dry

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