366 



Peters — Volumetric Estimation of Copper. 



Table III (continued). 







Element 







Volume 









CuO 



from which 





HNOs 



at 









taken as 



copper was 



Oxalic 



sp. gr. 



precipi- 



CuO 







CuSO,. 



separated. 



acid. 



1-40. 



tation. 



found. 



Error. 





gms. 



gms. 

 CdO taken 

 as CdSO-4. 



gms. 



cm 3 . 

 F 



cm 3 . 



gms. 



gms. 



33 



0-1990 



o-io 



2-0 



5-0 



60 



0-1983 



— 0-0007 



34 



cc 



0-20 



« 



cc 



65 



0-1987 



— 0-0003 



35 



a 



0-30 



e« 



cc 



70 



0-1987 



— 0-0003 



36 



cc 



0-40 



cc 



cc 



75 



0-1994 



+ 0-0004 



37 



tt 



0-50 

 As 2 3 taken 

 as Na 3 As0 3 . 



M 



cc 



G 



80 



0-1996 



+ 0-0006 



38 



a 



o-io 



(C 







55 



0-1991 



+ 0-0001 



39 



cc 



0-20 



(C 





60 



0-1987 



— 0-0003 



40 



cc 



0-50 



(I 







75 



0-1986 



— 0-0004 



41 



cc 



o-io 



c< 



5-0 



60 



0-1994 



+ 0-0004 



42 



« 



0-20 



a 



cc 



75 



0-1992 



+ 0-0002 



43 



cc 



0-60 

 As 2 5 taken 

 as H 2 KAs0 4 . 



(C 



cc 

 H 



85 



0-1995 



+ 0-0005 



44 



« 



o-io 



tt 







60 



0-1985 



— 0-0005 



45 



(< 



0-20 



a 



_ 



70 



0-1990 



±0-0000 



46 



cc 



o-io 



cc 



5-0 



65 



0-1990 



±0-0000 



4V 



cc 



0-20 



a 



cc 



75 



0-1992 



+ 0-0002 



48 



cc 



0-30 



a 



cc 



85 



0-1985 



— 0-0005 



49 



0-2030 

 Cu taken 



0-30 



Sn taken as 



3-0 



cc 



85 



0-2026 



— 0-0004 





as CuS0 4 . 



SnCl 9 + HCl. 





I 





Cu found. 





50 



0-1590 



0-0468 



2-0 



5-0 



55 



0-1581 



— 0-0009 



51 



cc 



0-0936 



a 



cc 



60 



0-1603 



+ 0-0013 



51a 



u 



cc 



a 



cc 



cc 



0-1591 



+ 0-0001 



52 



« 



cc 



a 



cc 



cc 



0-1594 



+ 0-0004 



53 



a 



0-1873 



a 



cc 



65 



0-1603 



+ 0-0013 



54 



a 



2809 



a 



cc 



70 



0-1914 



+ 0-0324 



55 



a 



cc 



3-0 



cc 



75 



0-1988 



+ 0-0398 





Sn taken as SnCl 



i- 



K 









56 



cc 



o-io 



2-0 



(C 



55 



0-1581 



— 0-0009 



57 



a 



o-io 



a 





cc 



0-1565 



— 0-0025 



58 



cc 



0-20 



a 



5-0 



cc 



0-1577 



— 0-0013 



59 



CuO taken 



0-50 



Fe 2 3 taken 



a 



cc 



60 



0-1562 



— 0-0028 





as CuS0 4 . 



as Fe(N0 3 ) 3 . 





L 





CuO found. 



60 



0-1990 



0-136 



2-0 



5-0 



60 



0-1987 



— 0-0003 



61 



cc 



0-272 



cc 



cc 



cc 



0-1983 



— 0-0007 



62 



k 



0-364 



cc 



CC 



cc 



0-1988 



— 0-0002 



63 



« 



0-544 



cc 



cc 



65 



0-1971 



— 0-0019 



64 



« 



0-272 



cc 







60 



0-1995 



+ 0-0005 



65 



cc 



0-544 



cc 



2-0 



cc 



0-1998 



+ 0-0008 



66 



(( 



0-218 



cc 



tl 



65 



0-1999 



+ 0-0009 





ZnO taken as ZnSO 



I- 



M 









67 



<( 



0-028 



it 



5-0 



60 



0-2007 



+ 0-0017 



68 



CC 



0-057 



cc 



tt 



65 



0-2008 



+ 0-0018 



69 



« 



u 



cc 



It 



cc 



0-2008 



+ 0-0018 



70 



cc 



0-085 



cc 



a 



70 



0-2035 



+ 0-0045 



