(3) on charcoal. As in the glass-bulb. Then fuses, coloring the outer flame green, and is reduced to metallic copper and [,Cu=].
(4) in forceps. Fuses and colors the outer flame blue.
(5) in borax. The roasted mineral gives copper reaction.
(7) with carb. soda. Yields metallic copper. The alkaline mass laid on silver gives S reaction.
(8) Special reactions. Gives the sulphuric acid reaction.
(1) in glass-bulb. Gives off water and turns black.
(3) on charcoal. Gradually heated, turns black and fuses to a bead, having a core of metallic copper.
(4) in forceps. Fuses but does not color the flame distinctly. On cooling is black and crystalline.
(7) with carb. soda. With much of the alkali is decomposed, yielding metallic copper. With small portions successively added first fuses and then intumesces, fuses with a strong flame, and is then absorbed into the charcoal, leaving metallic copper.
(8) Special reactions. Gives the phosphoric acid reaction.
Formula. [.Cu]^{ 4}([.....As][.....P]) + [.H].
(3) on charcoal. Fuses with detonation and the evolution of arsenical fumes to a brittle regulus, brown externally and having a white fracture.
(4) in forceps. Fuses and colors the outer flame green. On cooling has a crystalline surface.
(7) with carb. soda. Is reduced, yielding metallic copper.
(8) Special reactions. Gives the arsenic reactions.
(1) in glass-bulb. Fuses and, when strongly heated, volatilizes being redeposited in the tube as a dark grey sublimate.
(2) in open tube. Fuses and gives off dense white fumes, which are partly redeposited on the tube. Sometimes also gives off arsenical fumes in small quantity.
(3) on charcoal. Fuses and gives off dense white fumes, which thickly incrust the charcoal and color the flame blue immediately beyond the assay.
(5) in borax. The oxide formed upon charcoal gives the antimony reactions.
(8) Special reactions. The incrustation on the charcoal, if treated with nitrate of cobalt assumes the characteristic green color.
(1) in glass-bulb. Fuses readily and occasionally gives off a small quantity of sulphur. Strongly heated forms a brown sublimate of SbS^{ 3} and SbO^{ 3}.
(2) in open tube. Fuses and gives off SO^{ 2}, which passes off up the tube, and dense white fumes of SbO^{ 3} and SbO^{ 5} which are partly deposited in the tube.