A solution contains carbonate, chloride and sulfate ions - HSC - SSCE Chemistry - Question 24 - 2060 - Paper 1
Question 24
A solution contains carbonate, chloride and sulfate ions.
Describe a sequence of tests that could be used to confirm the presence of each of these ions. Include ONE... show full transcript
Worked Solution & Example Answer:A solution contains carbonate, chloride and sulfate ions - HSC - SSCE Chemistry - Question 24 - 2060 - Paper 1
Step 1
Test for Carbonate Ions
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Answer
To test for carbonate ions, add a few drops of dilute nitric acid to the solution. If bubbles of carbon dioxide gas are produced, this indicates the presence of carbonate ions. The reaction can be represented as:
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Answer
To test for chloride ions, add a few drops of dilute silver nitrate solution to the solution. A white precipitate of silver chloride will form if chloride ions are present. The reaction can be represented as:
ightarrow ext{AgCl}(s)$$
Step 3
Test for Sulfate Ions
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To test for sulfate ions, first add barium chloride solution to the solution. If a white precipitate of barium sulfate forms, it indicates the presence of sulfate ions. The reaction can be represented as:
