260 SALTS 



I ascribe to the portion of the salt, which had 

 been reduced to a white crust. 



Binacetate, \Q t Binacetate of potash. This salt was ob- 

 tained by dissolving carbonate of potash in acetic 

 acid, in the proportion of one integrant particle 

 of the former to two integrant particles of the 

 latter, and concentrating the solution over sul- 

 phuric acid, under the exhausted receiver of an 

 air pump. The binacetate crystallized to the 

 very last drop in large transparent flat plates, so 

 irregular, that their form could not be determin- 

 ed, though they were probably four-sided prisms. 

 These crystals had a sour taste, reddened vege- 

 table blues, and deliquesced rapidly when ex- 

 posed to the air. 



&5'&5 grains of these crystals, when cautiously 

 heated on the sand bath, lost 6'75 grains of their 

 weight, consisting of pure water ; and when 

 heated to redness in a platinum crucible, left 

 8*75 grains of carbonate of potash, equivalent to 

 6 grains of potash. Hence, the constituents of 

 the salt are 



C 2. atoms acetic acid 12' 5 



1 atom potash . 6 



6 atoms water . 6*75 



25-25 



Benzoate, 13. Benzoate of potash. This salt was ob- 

 tained by digesting benzoic acid and carbonate 



