The Elements of Blowpipe Analysis Part 4

Before the Bp. on Ch. with Na_{2}CO_{3} Reduced to a metallic powder, magnetic.

In ignition tube with Na_{2}CO_{3} and Ch.____

In flame on platinum wire____

With borax bead on platinum wire. In O. F. red while hot, yellow when cold.

With Co(NO_{3})_{2}____

10. ~Lead, PbO.~--Before the Bp. on Ch. Easily reduced to the metal, bead very malleable. Coating yellow, surrounded by white ring.

Before the Bp. on Ch. with Na_{2}CO_{3}. Instantly reduced. Coats the Ch. upon further blowing.

In ignition tube with Na_{2}CO_{3} and Ch. Reduced to the metal.

In flame on platinum wire. Tinges flame blue.

With borax bead on platinum wire. In O. F. dissolves easily, forming a limpid gla.s.s.

With Co(NO_{3})_{2}____

11. ~Manganese, Mn_{2}O_{3}.~--Before the Bp. on Ch. At high temperature turns red.

Before the Bp. on Ch. with Na_{2}CO_{3}. Is not reduced.

Before the Bp. in O. F. on platinum foil with Na_{2}CO_{3}. Transparent green ma.s.s when hot. Opaque, bluish-green when cold.

In ignition tube with Na_{2}CO_{3} and Ch. Not reduced.

In flame on platinum wire____

With borax bead on platinum wire. In O. F. violet-red while hot, amethyst-red when cold.

With Co(NO_{3})_{2}____

12. ~Mercury, HgO.~--Before the Bp. on Ch. Instantly reduced. Very volatile.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced and volatilized.

In ignition tube with Na_{2}CO_{3} and Ch. Sublimes condensing in the upper part of the tube as a metallic ring which is seen with the lens to consist of minute globules of mercury.

In flame on platinum wire____

With borax bead on platinum wire____

With Co(NO_{3})_{2}____

13. ~Nickel, NiO.~--Before the Bp. on Ch. In O. F. unchanged. In R. F.

reduced to metal, slightly magnetic.

Before the Bp. on Ch. with Na_{2}CO_{3}. Easily reduced to the metal.

In ignition tube with Na_{2}CO_{3} and Ch.____

In flame on platinum wire____

With borax bead on platinum wire. In O. F. violet while hot, reddish-brown when cold.

With Co(NO_{3})_{2}____

14. ~Silver, AgO.~--Before the Bp. on Ch. Easily reduced to the metal.

White, malleable, hard bead. Coats the coal dark red near a.s.say.

Before the Bp. on Ch. with Na_{2}CO_{3}. Instantly reduced to metallic globule.

In ignition tube with Na_{2}CO_{3} and Ch. Reduced to the metal.

In flame on platinum wire____

With borax bead on platinum wire. In O. F. partially dissolved. Bead becomes milk-white.

With Co(NO_{3})_{2}____

15. ~Tin, SnO_{2}.~--Before the Bp. on Ch. Coats the coal yellow while hot, dirty white when cool. Not reduced.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced to metallic tin. White, hard, malleable bead. Coating white and close to a.s.say.

In ignition tube with Na_{2}CO_{3} and Ch.____

In flame on platinum wire____

With borax bead on platinum wire. In O. F. small quant.i.ty dissolves to limpid gla.s.s.

With Co(NO_{3})_{2}. Greenish-blue color.

16. ~Zinc, ZnO.~--Before the Bp. on Ch. Upon ignition becomes yellow. Is not reduced.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced to metal. Rapidly volatilized, coating the coal white.

In ignition tube with Na_{2}CO_{3} and Ch.____