Chemistry 0620 · IGCSE · Identification of ions and gases

Identification of ions and gases — practice question

Aqueous sodium hydroxide was added drop by drop, and then in excess, to separate solutions of W, X, Y and Z. The outcomes are shown. Which row identifies the metal ions in the solutions?

  • AW: aluminium; X: calcium; Y: copper(II); Z: iron(II)
  • BW: aluminium; X: calcium; Y: iron(II); Z: copper(II)
  • CW: aluminium; X: iron(II); Y: calcium; Z: copper(II)
  • DW: calcium; X: aluminium; Y: copper(II); Z: iron(II)

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