a few drops of dilute nitric acid and a few drops of silver nitrate - white precipitate of silver chloride
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To identify sulfate ions
a few drops of dilute hydro-chloric acid and a few drops of barium chloride- white precipitate of barium sulfate
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To identify carbonate ions
add dilute acid, which will give off CO2, lime-water can be used to confirm the identity of the gas (lime-water turns milky when carbon dioxide is bubbled through it)
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