12
III.
. III (, ). Na2C10H14O8N22H2O. . III . . . . :
Zn2+ + H2Y2 = ZnY2 + 2H+.
: ; , , , .
: ~0,05 . III ( ); ZnSO4, ..; 9; NaCl 1:100.
.
ZnSO4, 100,0 0,05 . ;
m = CVMf =
ZnSO4 , 10 % , , . . ZnSO4 . , :
m+- = m = m- = m+- m =
2/3 . , , . , . (1/2 ZnSO4) 4 .
(1/2 ZnSO4 ) = 
=
(10) ZnSO4, 20 25 ( ) - .
. - .
, , 0,1 . , . , , 0,1 :
V1 = V2 = V3 = V =
III ( , ):
(1/2) = 
=
():
| () | |
| -, , . |
: ___ ___________ 20__ . : ____________
: ___ ___________ 20__ .
