Chemistry 0620 · IGCSE · Identification of ions and gases

Identification of ions and gases — practice question

Separate samples of four different aqueous metal nitrates are each examined using aqueous sodium hydroxide, dilute sulfuric acid and a flame test. Which row gives the correct collection of results for the named aqueous metal nitrate?

  • Asodium nitrate; with aqueous sodium hydroxide: no visible change; with dilute sulfuric acid: white precipitate; flame test: yellow flame
  • Bcopper(II) nitrate; with aqueous sodium hydroxide: blue precipitate; with dilute sulfuric acid: no visible change; flame test: blue-green flame
  • Cbarium nitrate; with aqueous sodium hydroxide: white precipitate; with dilute sulfuric acid: no visible change; flame test: blue-green flame
  • Dcalcium nitrate; with aqueous sodium hydroxide: no visible change; with dilute sulfuric acid: white precipitate; flame test: yellow flame

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