Sulphuric acid releases chlorine gas

Sulphuric acid releases chlorine gas

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Caption: Halide analysis. Chlorine being liberated during the determination of a halide using acid. The common halides (chloride, bromide, iodide) all form colourless crystals with various positive ions. To determine which halide ion is present, the halide crystals are treated with concentrated sulphuric acid. This displaces the halide from the crystal, liberating the halogen as a gas. The gas may then be identified by its colour (chlorine = green, bromine = orange/brown, iodine = purple/brown).

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Keywords: acid oxidation, acid reaction, analysis, chemical, chemistry, chloride, chlorine, experiment, from chloride, halide, test tube

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