244
C. De Stefano· C. Foti . A. Gianguzza . D. Piazzese . S. Sammartano
100r, --~~----------------------,
2
~
;; 50
CI..
~
0'
Cl..
N
~ o
~
J L ~
4
6
8
4
6
8
pH
pH
6
pH
pH
8
4
6
8
4
6
8
6 pH
8
pH
Fig. 9.11. Speciation diagrams for Pcfi, P20~- and P30io, by' considering the apparent protonation constants only, in SSWE (right) (S = 35), and in NaCl 0.75 moll- 1 (left), at t= 25°C. Species: 1: HzL; 2:HL; 3: L
Table 9.14. Formation constants of B 1.117+ - PO~-, -P zO~and -P30 10
5 - complexes, at
t = 25°C and 1= 0 mol rl
L
log f3 o '
10gf3/
10gf3z'
pd- 4
4.75
13.90 (1 .57)b
20.3 (Od
pp~
5.81
12.82 (3.22)
17.96 (1.6)
pp~;
6.36
12.80 (3.36)
17.3 (1.4)
a Overall formation constants relative to the reaction (charges
omitted): B + L + rH H BLH.
b In parentheses values of equilibrium constants for the reaction:
B+HrLHBLH r ·
C. De Stefano· C. Foti . A. Gianguzza . D. Piazzese . S. Sammartano
100r, --~~----------------------,
2
~
;; 50
CI..
~
0'
Cl..
N
~ o
~
J L ~
4
6
8
4
6
8
pH
pH
6
pH
pH
8
4
6
8
4
6
8
6 pH
8
pH
Fig. 9.11. Speciation diagrams for Pcfi, P20~- and P30io, by' considering the apparent protonation constants only, in SSWE (right) (S = 35), and in NaCl 0.75 moll- 1 (left), at t= 25°C. Species: 1: HzL; 2:HL; 3: L
Table 9.14. Formation constants of B 1.117+ - PO~-, -P zO~and -P30 10
5 - complexes, at
t = 25°C and 1= 0 mol rl
L
log f3 o '
10gf3/
10gf3z'
pd- 4
4.75
13.90 (1 .57)b
20.3 (Od
pp~
5.81
12.82 (3.22)
17.96 (1.6)
pp~;
6.36
12.80 (3.36)
17.3 (1.4)
a Overall formation constants relative to the reaction (charges
omitted): B + L + rH H BLH.
b In parentheses values of equilibrium constants for the reaction:
B+HrLHBLH r ·