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Reactions of ions in aqueous solution (A-level only)

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Question 12

An aqueous solution of an unknown salt Y Y\,Y undergoes the following chemical tests:

  1. Addition of a few drops of aqueous sodium carbonate, Na2CO3\text{Na}_2\text{CO}_3Na2​CO3​, produces a brown precipitate and a gas that turns limewater cloudy.
  2. Addition of excess aqueous ammonia, NH3\text{NH}_3NH3​, produces a brown precipitate that is insoluble in the excess reagent.
  3. Addition of dilute nitric acid followed by silver nitrate solution, AgNO3\text{AgNO}_3AgNO3​, produces a white precipitate that dissolves readily in dilute aqueous ammonia.

What is the formula of salt YYY?

FeCl2\text{FeCl}_2FeCl2​

AlCl3\text{AlCl}_3AlCl3​

FeCl3\text{FeCl}_3FeCl3​

FeBr3\text{FeBr}_3FeBr3​

Reactions of ions in aqueous solution (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Reactions of ions in aqueous solution (A-level only)