Estimation of Molyhdic Acid. 



157 



Treatment 18-22 Tirs. in cold. 

 (Method of Mauro and Danesi.) 



» 



HCl. 



H2O. 



KI. 



MoOs as above. 



M0O3 found. 



Error. 



cc. 



cc. 



grm. 



grm. 



grm. 



grm. 



2-5 



1-5 



1'5 



•0986 



•0982 



•0004 — 



2-5 



1-5 



1-5 



•0982 



•0979 



•0003- 



2-5 



1-5 



1-5 



•2041 



•2024 



•0017- 



2-5 



1-5 



1-5 



•2059 



•2043 



•0016- 



2-5 



1-5 



1-5 



•2063 



•2040 



•0023- 



2-5 



1-5 



1-5 



■3116 



•3059 



•0057- 



2-5 



1-5 



1-5 



•3098 



•3011 



•0087 — 



2-5 



1-5 



1-5 



•4080 



•4011 



•0069— 



2-5 



1-5 



1-5 



•4087 



•4015 



•0072- 



2-5 



1-5 



1-5 



•5210 



•5102 



•0108- 



2-5 



1-5 



1-5 



•5172 



•5023 



•0149 — 







Treatment at \^^° for 1 hour. 





Amou 



nts of liquid 



and iodide different from those of Mauro and Danesi 



HCl. 



H2O. 



KI. 



M0O3 taken. 



M0O3 found. 



Error. 



cc. 



cc. 



grm. 



grm. 



grm. 



grm. 



15 



15 



•5 



•0893 



•0897 



•0004 + 



15 



15 



•5 



•0824 



•0813 



•0011 — 



15 



15 



•5 



•0828 



•0813 



•0015- 



15 



15 



•6 



•0990 



•0982 



•0008- 



10 



10 



•5 



•0841 



•0842 



•0001 + 



10 



10 



•5 



•1683 



•1591 



•0092- 



10 



10 



•5 



•1706 



•1536 



•0170- 



20 



20 



•5 



•1695 



•1633 



•0062 — 







Treatment 18 hours in cold. 





(Amounts of liquid different from those of Mauro and Danesi.) 



HCl. 



HsO. 



KI. 



MoOs taken. 



M0O3 found. 



Error. 



cc. 



cc. 



grm. 



grm. 



grm. 



grm. 



40 



10 



1-5 



•5018 



•4847 



•0171- 



90 



30 



1-5 



•5005 



•4910 



•0095 — 



V5 



25 



1-5 



•5035 



, -4934 



•0101 — 



75 



25 



1-5 



•5022 



•4920 



•0102- 



The explanation of these experimental results we were 

 inclined to believe lay in a tendency on the part of the iodine, 

 set free in the process, to reverse the action. If this is so, the 

 obvious remedy should be found in the removal of the iodine 

 from the sphere of action, and this idea led us to experiment 

 upon a process of distillation in which the iodine should be 

 collected and estimated in the distillate ; but before our work 

 was completed, Friedheim and Euler published* the results of 

 their investigation along the same line. 



II. Distillation Process. — These investigators have shown 

 that if molybdic acid is treated with potassium iodide and 



* Berichte d. d. Chem. GeseU., xiviii^ 2066. 



