Benzoates with the earthy and metallic Salts. 259 



solutions ; and this subject being of great moment for 

 analytical chemistry, I undertook to examine nuire closely 

 the changes which benzoates occasion in solutions of the 

 earths and metals, 



I must first remark, that the solutions of all the earths 

 and metals employed were to the utmost saturated and 

 neutralized with pure ammonia, and diluted with water. 

 That the benzoate had been prepared from pure, sublimated 

 and white acid, is superfluous to mrntion, as also that all 

 the earths and metals made use of possessed the highest 

 degree of purity. 



I. Benzoate of Ammonia with earthy Salts. 



1. In a solution of nitrate of baryta no precipitation took 

 place, when some drops oi l)e?izoate of ammonia were added. 



2. In a muriatic solution of sirontia, no precipitation. 



3. In muriate oi magnesia, no precipitation. 



4. With nitrate of ytlria, a white precipitate is pro- 

 duced, but which soon redissolves on diluting and shaking 

 the fluid. 



5. With muriate of lime, there is produced a white pre- 

 cipitation which is somewhat difficultly soluble, but which 

 on diluting and shakiniJ disappears. 



6. In a solution of alum saturated with ammonia there 

 will be found a white precipitate, which dissolves slowly 

 when greatly diluted. In a diluted and neutralized solu- 

 tion of sulphate of alumina, the benzoate of alumine dis- 

 solves with facility in the cold, by agitation with beryl 

 and zirkonia. I have not been enabled to learn its action^ 

 owing to the want of these earths. 



II. Benzoate of AmmorAaudth Metals. 



1. With a solution oi' Qold, no precipitation. 



2. With a solution oi pLatina, no precipitation. 



3. Wiih nitrate of pure nickel, no precipitation. 



4. With sulphate ot zinc, no precipitation. 



5. With nitrate of to^fl/^, no precipitation. 

 C. In tunslat of ammonia, no precipitation. 

 Ifahtile nitric acid be added, there will be a copious 



white precipitate, which in waier is nearly insoluble. 



7. With molybdal of ammonia, no precipitation. 



8. With muriate oi manganese, no precipitation. 



9. With nitrate of silver, a white precipitate which 

 easilv dissolved by agitation. 



10. With acetate of leady a white precipitate which easily 

 redissolves. 



R2 11. With 



