COPPER. 
cording to Hassenfratz, is 1.4158 *. When exposed to 
a red heat, it loses its water, and acquires a brown co 
lour. When violently heated, phosphorated copper 
comes over. According to the analysis of Mr Chenevix, 
it is composed of 
brown oxide 49 5 2 hydrat of copper 61. 5 
water .... 12 
acid ..... 35.0 
water.. 
3.5 
100.0 
Sp. 6. Fluat of Copper. 
FLUORIC ACID dissolves a small portion of copper 
when assisted by heat ; and it dissolves its oxide with 
facility. The solution is gelatinous, and yields, when 
evaporated, blue crystals of fluat of copper, in the form 
of cubes or oblongs 1. 
Sp. 7. Borat of Copper. 
WHEN borax is poured into a solution of sulphat of 
copper, borat of copper is precipitated in the form of a 
pale light-green jelly, which when dried is with great 
difficulty soluble in water. It easily melts into a dark red 
vitreous substance §. According to Palm, by long tri 
turation of filings of copper and boracic acid in water, 
and then digesting the mixture, it dissolves, and crystals 
may be obtained from it. 
Sp. 8. Carbonat of Copper. 
CARBONIC ACID does not attack copper; but it com 
t Phil. Trans. 1801. p 206. 
* Ann. de Chim. xxviii. 12. 
§ Bergman. 
Scheele, i. 33. 
505 
Chap. iII.