Tests for gases
2:48 describe tests for these anions: Cl⁻, Br⁻ and I⁻ using acidified silver nitrate solution, SO₄²⁻ using acidified barium chloride solution, CO₃²⁻ using hydrochloric acid and identifying the gas evolved
Describe tests for anions: Halide ions (Cl–, Br– and I–)
Describe tests for anions: Sulfate ions (SO42–)
Describe tests for anions: Carbonate ions (CO32-)
Add copper sulfate (CuSO4) to a sample.
If water is present the anhydrous copper sulfate will change from white to blue.