Chemistry 9701 · AS & A Level · Group 17

Group 17 — practice question

Chile saltpetre, $\text{NaNO}_3$, has sodium iodide as an impurity. Aqueous silver nitrate is added to an aqueous solution of Chile saltpetre. Concentrated aqueous ammonia is then added. Which observations would be seen?

  • Awith acidified silver nitrate: no precipitate; with concentrated aqueous ammonia: no further reaction
  • Bwith acidified silver nitrate: no precipitate; with concentrated aqueous ammonia: precipitate forms
  • Cwith acidified silver nitrate: precipitate forms; with concentrated aqueous ammonia: precipitate dissolves
  • Dwith acidified silver nitrate: precipitate forms; with concentrated aqueous ammonia: precipitate remains

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