374 SALTS 



1 atom acetic acid . 6 % -25 



2 atoms protoxide of lead 28 

 10 atoms water 11-25 



45-5 



Triacetate, 14. Trisacetate of lead. This salt was first 

 obtained by Thenard. His method was to boil 

 23-625 parts of crystallized acetate of lead with 

 35*44 parts of litharge, deprived of its carbonic 

 acid by heat. The liquid thus obtained when 

 evaporated deposited the trisacetate in white 

 plates. It is still soluble in water, but less so, 

 and has a less sweet taste, than common acetate 

 of lead. I have not myself made any experi- 

 ments on this salt ; but Berzelius analyzed it, 

 and found its constituents 



Acetic acid . 6-25 



Protoxide of lead 41 



Three atoms of protoxide of lead weigh 42. 

 Hence it is obvious, that the salt was a com- 

 pound of 1 atom acid and 3 atoms protoxide of 

 lead. If any confidence can be put in Thenard's 

 analysis, it contains 2 atoms water. 

 Benzoate, 15. Benzoate of lead. This salt forms crys- 

 tals of a brilliant white colour, soluble both in 

 water and alcohol. From the analysis of Berze- 

 lius, its constituents are 



