ON ANTIMONIATE OF POTASH AND EARTHS. 
37 
ART. XII. ON THE BEHAVIOUR Of THE ANTIMONIATE OF 
POTASH TOWARDS THE EARTHS. 
By M. Wackenroder. 
From my examination of the applicability of antimoniate 
of potash as a test for soda, I was led to investigate its be- 
haviour towards the alkaline earths, and also towards albu- 
mina ; since from the frequent occurrence of the three latter 
bases in salts of potash and soda, the value of the antimoniate 
of potash as a test would be considerablydiminished, if we 
remained unacquainted with its behaviour towards salts 
containing these earths. 
The following are the results of my experiments. I need 
only add that the strength of the solutions were the same as 
employed in my former investigation. 
Salts of Barytes. — Antimoniate of potash produces, in a 
solution of chloride of barium, a white, voluminous, rloccu- 
lent precipitate of antimoniate of barytes, which does not 
alter its state of aggregation even after long standing. 
When the solution of the chloride of barium is very much 
diluted, the antimoniate of potash still causes a flocculent 
sediment ; but the precipitate only forms on the addition of 
a sufficient quantity of the potash salt, from the antimoniate 
of barytes being soluble in an excess of chloride of barium. 
This clear solution deposits very few or no flakes within 
twenty-four hours, but there separates on the surface a 
small pellicle of a salt, which consists of roundish, adherent 
granules resembling fish-roe. It would therefore appear 
that this pellicle is produced by the carbonic acid of the at- 
mosphere, and is consequently merely accessory. 
Salts of Strontia. — Antimoniate of potash behaves to- 
wards a solution of chloride of strontium in nearly the same 
manner as towards chloride of barium. However, with a 
certain concentration of the liquid, and a certain addition 
vol. x. — no. 1. 4 
