288 
DR. KANE ON THE CHEMICAL HISTORY 
Of the material so dried, 32*043 grains were fused with carbonate of soda, and the 
mass having been boiled with water, the palladium was collected on a filter and 
ignited. It was purely metallic, and weighed 16*653 grains, being 51*97 percent, of 
the dry, or 43*75 per cent, of the hydrated salt. 
The liquor filtered from the metallic palladium was acidulated by muriatic acid, 
and precipitated by nitrate of barytes. It gave 37‘492 grains of sulphate of barytes, 
containing 12*997 grains of sulphuric acid, equivalent to 40*17 per cent, of the dry, 
and to 33*82 per cent, of the hydrated salt. 
These results give therefore for the 
Water .... 
Dry Salt. 
Hydrated Salt. 
15*81 
Sulphuric acid . 
40-17 
33*82 
Palladium . . . 
51*97 
43*75 
Oxygen and loss . 
7-86 
6*62 
100*00 
100*00 
The formula Pd O . S 0 3 + 2 . H O gives 
Water .... 
Dry Salt. 
Hydrated Salt. 
15*08 
Sulphuric acid . 
39*54 
33*58 
Palladium . . . 
52*56 
44*64 
Oxygen . . . 
. 7'90 
6*70 
100*00 
100*00 
When the dried sulphate of palladium is exposed to the air it rapidly re-acquires 
water to the extent of one equivalent, without becoming sensibly damp. This quan- 
tity was determined several times ; the proportion being that 100 parts of the dry 
salt regained nine to ten parts of water, forming therewith a greenish olive powder. 
If the air be very damp, it subsequently deliquesces completely. By this property 
the sulphate of palladium appears to ally itself with the sulphates of copper, magnesia, 
&c., but it differs widely from them in others. Thus it is decomposed by water, and 
I could not succeed in forming any double salts by bringing it into contact with the 
alkaline sulphates. Its analogue here would appear to be the sulphate of mercury. 
Basic Sulphate of Palladium. 
When a strong solution of sulphate of palladium is mixed with much water it is 
decomposed ; a deep brown powder is separated, and the liquid becomes very acid. 
By the addition of free sulphuric acid this action of water may be prevented ; but 
on neutralizing this excess of acid by an alkali, even ammonia, a brown powder 
separates, which is found on analysis to be identical with the former. 
The following analyses were made of specimens of this salt, prepared under various 
circumstances. 
