A student adds dilute nitric acid then silver nitrate solution to an unknown solution and no precipitate forms. What can be concluded?

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Question

A student adds dilute nitric acid then silver nitrate solution to an unknown solution and no precipitate forms. What can be concluded?

Accepted Answer

No chloride, bromide or iodide ions are present in the solution — Award 1 mark. A negative result rules out those three halides but says nothing about which other ions are present, so further tests would be needed before any positive conclusion could be drawn.

Answer

The solution must contain carbonate ions

Answer

No chloride, bromide or iodide ions are present in the solution

Answer

The solution must contain sulfate ions

Answer

The solution contains fluoride ions

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