PALLADIUM. 317 



Two preliminary experiments, however, with potassium palladiochloride 

 are given, in which the salt was reduced in hydrogen, and both Pd and 

 KC1 were weighed. The data are as follows, with the ratio (calculated 

 as with Berzelius' experiments) given in a third column : 



2KCI. Pd. Ratio. 



1.49767 1.05627 70.528 



.90484 .63738 70.441 



Mean, 70.485, ,0290 



Hence Pd = 104.312. 



The palladiammonium chloride was studied by two methods. First, 

 weighed quantities of the salt were reduced in hydrogen, the ammonium 

 chloride so formed was collected in an absorption apparatus, and then 

 precipitated with silver nitrate. The weights found were as follows, with 

 the Pd(NH 3 Cl) 2 proportional to 100 parts of silver chloride given in the 

 third column : 



AgCl. Ratio. 



24276 1.682249 73.879 



08722 1.468448 % 74.040 



47666 2.000164 73.828 



34887 1.837957 73.390 



74569 2.362320 73-898 



Mean, 73.807, .0742 



Hence Pd = 105.808. Bailey and Lamb regard this as too high, and 

 suspect loss of NH 4 C1 during the operation. 



The second series of data resemble Reiser's. The salt was reduced in 

 hydrogen, and the spongy palladium was weighed in a Sprengel vacuum. 

 The data are as follows : 



Pd(NHzCr}v Pd. Per cent. Pd. 



A f 1.890597 -947995 50-H3 



' ( 1.874175 .940271 50.170 



( 1.307076 .654687 50.088 



B ! 1.340045 .633207 50.238 



'1 1-905536 .955950 5- l6 7 



1 1.685582 .846472 50.218 



1.691028 .849120 50.213 



2.112530 1.059690 50.162 



2.110653 1.057910 50.122 



1.969100 .988155 50.184 



Mean, 50.171, .0099 



Hence Pd = 104.943. Bailey and Lamb's weighings are all reduced 

 to a vacuum. 



