----------------------------------------------------------------------------- BEHAVIOR OF SUBSTANCE | ----------------------------------------------------------------------------| Before Bp.| Before Bp. | In ignition | In flame| In flame | After first | on Ch. | on Ch. with | tube with | on | with borax| ignition | alone | Na_{2}CO_{3}| Na_{2}CO_{3}| platinum| bead | with | | | and Ch. | wire | | Co(NO_{3})_{2}| ----------------------------------------------------------------------------| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------------------| _Remarks_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ | | _Substance_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ | ---------------------------------------------------------------------------- 1. ~Aluminum, Al_{2}O_{3}.~--Before the Bp. on Ch. Infusible. No change. Before the Bp. on Ch. with Na_{2}CO_{3}. Forms an infusible compound with slight intumescence. In ignition tube with Na_{2}CO_{3} and Ch. No change. Moisture driven off. In flame on platinum wire. No change. Becomes incandescent. In flame with borax bead. In O. F. dissolves slowly, forming a colorless glass which remains so on cooling. With Co(NO_{3})_{2}. Mass becomes blue upon re-ignition. 2. ~Antimony, Sb_{2}O_{3}.~--Before the Bp. on Ch. In O. F. volatilizes without change. In R. F. is reduced and volatilized. White coating of antimonious oxide deposited on Ch. Blue tinge imparted to flame. Before the Bp. on Ch. with Na_{2}CO_{3}. Readily reduced. White brittle bead. Very volatile, giving characteristic white coating. In ignition tube with Na_{2}CO_{3} and Ch. Volatilized. In flame on platinum wire. Volatilized. Colors flame greenish blue. With borax bead on platinum wire. In O. F. dissolves to a colorless glass. With Co(NO_{3})_{2}.____ 3. ~Arsenic, As_{2}O_{3}.~--Before the Bp. on Ch. Very volatile. Strong garlic odor to fumes.