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

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Question 4

A student is given two aqueous solutions, X X\,X and YYY, that both contain metal salts.

The student performs a series of chemical tests on both solutions.

Table 1 summarizes these tests and the resulting observations.

Table 1

TestObservations with XObservations with Y
Add ammonia solution slowly until in excess.A brown precipitate forms that is insoluble in excess.A green precipitate forms that is insoluble in excess.
Add sodium carbonate solution.A brown precipitate forms. Effervescence is seen.A green precipitate forms.
Add dilute nitric acid and then divide into two portions.No change is seen.No change is seen.
Add barium chloride solution to the first portion.No change is seen.A white precipitate forms.
Add silver nitrate solution to the second portion.A white precipitate forms.No change is seen.

Identify the salts present in solutions X and Y using the results in Table 1.

In your answer:

  • identify the chemical formula of all precipitates formed
  • explain why effervescence is observed in the reaction of sodium carbonate with X but not with Y
  • write balanced ionic equations for all of the precipitation and effervescence reactions.
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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)