OF COPPER. 377 



1 atom sulphuric acid 5 



1 atom peroxide of copper 5 



5 atoms water 5-625 



15-625 



2. Nitrate of copper. This is also a well 

 known and beautiful salt. It is so deliquescent, 

 that it is not easy to obtain it in well defined 

 crystals. Its constituents are 



1 atom nitric acid . 6-75 



1 atom peroxide of copper 5 

 7 atoms water . . 7 -8 7 5 



19-625 



3. Carbonate of copper. Of this salt there Carbonates, 

 are three species met with native ; namely, the 

 anhydrous carbonate, which has a brown colour ; 

 the green carbonate, and the blue carbonate. 

 The constituents of the anhydrous carbonate are 

 as follows : 



1 atom carbonic acid . 2*75 



2 atoms peroxide . 10 



12-75 



It is therefore a di carbon ate. 



(2.) The green carbonate of copper constitutes 

 the beautiful ore of copper called malachite. 

 When pure, its constituents are 



