| Description |
Relatively soft, silvery-white metal. Obtained from BaO on heating with
aluminum. Attacked by air and water. Used mainly as BaSO4 in drilling
fluids for oil and gas exploration; small amounts used in paints, glass,
etc Diagnostic tests:
A yellowish green coloration of the flame test is given by all barium
salts, except the silicates.
In solution, the presence of barium is proved by the heavy white
precipitate formed by the addition of dilute H2SO4.
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