108 SALTS 



tate, which is phosphate of silver. This powder 

 is insoluble in water ; but not quite destitute of 

 the peculiar taste which characterizes the salts of 

 silver. 43 grains of anhydrous nitrate of silver 

 were mixed with a solution of 42 grains of phos- 

 phate of soda. The yellow coloured precipitate, 

 when washed and dried on the filter, weighed 

 27-74 grains. When exposed to heat on the 

 sand bath, it gave out no water, and did not lose 

 any sensible weight. A little carbonate of soda 

 being dropt into the liquid from which the yel- 

 low precipitate fell, a new portion of yellow pre- 

 cipitate appeared, which, being collected on a 

 filter, washed, and dried, weighed 8*5 grains. 

 It was rather paler coloured than the first preci- 

 pitate, but in other respects similar. It was also 

 anhydrous. 



Thus, the precipitate from 43 grains of ni- 

 trate of silver weighed 36*24 grains ; it lost, 

 when heated to redness, 0*624 grain, and was 

 reduced to 35*61 6 grains ; it contained all the 

 oxide of silver in 43 grains of nitrate, or 29'5 

 grains the remainder of the weight consisted of 

 phosphoric acid. Hence, the phosphate of sil- 

 ver obtained in this way, was composed of 



Oxide of silver . 29*5 or 

 Phosphoric acid . 6-116 - 3-058 



14*75 is the weight of an atom of oxide of silver, 



