Chemistry · Oct / Nov 2016 · Paper 12 · Question 25
5070Identification of ions and gases
The table shows the observations made when an aqueous solution of salt Z has different reagents added to it. | reagent(s) added | observation | |---|---| | aqueous sodium hydroxide | green precipitate formed | | dilute nitric acid then aqueous barium nitrate | white precipitate formed | What is Z?
- Acopper(II) chloride
- Bcopper(II) sulfate
- Ciron(II) chloride
- Diron(II) sulfate
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Correct answer: D. iron(II) sulfate
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