A mixture of copper(II) nitrate and copper powder can be used to obtain pure solid copper(II) nitrate. The method includes three stages: X add water and stir; Y crystallise; Z filter. Once these three stages are complete, the copper(II) nitrate is washed and dried. Which sequence of X, Y and Z is correct for producing pure solid copper(II) nitrate from the mixture?
- A$X \rightarrow Y \rightarrow Z$
- B$X \rightarrow Z \rightarrow Y$
- C$Y \rightarrow X \rightarrow Z$
- D$Z \rightarrow X \rightarrow Y$