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Test for positive ions

bella.mort

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Tests for negative ions

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There are three tests you need to know.

Mind Map by bella.mort, updated more than 1 year ago

	Created by bella.mort about 10 years ago

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Tests for negative ions

Carbonate ions
1. Add dilute hydrochloric acid to the substance to see if it fizzes. If it does and the gas turns limewater milky, the substance contains carbonate ions.
Halide ions
1. Add dilute nitric acid and then silver nitrate solution
  1. Chloride ions: White precipitate
  2. Bromide ions: Cream precipitate
  3. Iodide ions: Yellow precipitate
Sulfate ions
1. Add dilute hydrochloric acid and then barium chloride solution.
  1. If a white precipitate forms, sulfate ions are present.

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