388 SALTS 







little from 14*625, or 13 atoms of water. Hence, 

 the constituents of the salt are 



1 atom acetic acid . 6-25 



48 atoms oxide of copper 240-00 

 13 atoms water 14-625 



260-875 



unless we be rather disposed to consider it as a 

 mechanical mixture of oxide of copper and a lit- 

 tle trisacetate of copper ; this I think the most 

 probable supposition. 



12. Oxalate of copper. This is a green taste- 

 less insoluble powder, which, when dried in the 

 open air, is a compound of 



1 atom oxalic acid . 4-5 



1 atom oxide of copper 5 



1 atom water 1-125 



10-625 



One half of the water is very easily expelled by 

 heat i but the remainder continues obstinately 

 fixed till the acid undergoes decomposition. 

 Tartrate, 13. Tartrate of copper. This salt is easily 

 formed by mixing dilute solutions of sulphate of 

 copper and tartrate of potash. Small green crys- 

 tals by degrees form, which are very little soluble 

 in water. The constituents of this salt are 



1 atom tartaric acid . 8-25 



1 atom oxide of copper . 5 

 3 atoms water 3-375 



16-625 



