| Description |
Yellow-green, dense, sharp smelling gas, Cl2; produced on a large scale
by electrolysis of sodium chloride. Used as bleaching agent and to make
organochlorine solvents and polymers (PVC). Diagnostic tests:
Chlorine salts (along with F, Br, and I) will give a blue color to flames
when heated on a copper disk.
Treatment of the salt with concentrated H2SO4 acid will effervesce with
the evolution of a greenish, sharp smelling gas (Cl2). Chlorine
sometimes found associated
with bromine or iodine so a precipitate with AgNO3 solution is white (AgCl),
cream (AgBr), or yellow (AgI) depending on which anion predominates. The
precipitate is soluble in NH4OH
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