How can halides be tested for?

1 Answer
anor277
Jun 27, 2016

By addition of a soluble silver salt; typically AgNO_3(aq).

Explanation:

Ag(NO_3)(aq) + X^(-) rarr AgX(s) darr + NO_3^-

"Silver chloride" forms a curdy, insoluble white precipitate. "Silver bromide" forms a curdy, insoluble cream-coloured precipitate, "Silver iodide" forms a fine yellow precipitate. On standing, the precipitate reduces to metallic silver.

All of the silver halides are quite insoluble, See here for more details.

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