1. .
2. .
3. MgCl2 , PH=10
4. MgCl2 , PH= 8
, . , , . , , , - ; -.
- (F-,Cl-,Br-,I-),
(,), - .
: 100 0,05 MgCl2 100 0,05 . PH=10 PH=8. 90; 99; 99,9; (100,1;101; 110).
MgCl2
1. . PH=10 PH =10
MgY2- = MgY2-= 3,5 10-1 4,9 108 = 17,15 107
2. pMg . Mg2+ Mg2+ Mg2+, . , . , Mg2+ .
[ Mg2+] =
Mg2+, ;
Vx, Nx , Vt, Nt .
50%: [ Mg2+] = = 1,667 10-2 -/
P[Mg2+] = 2-lg1,667=2-0,22=1,78
90%: [ Mg2+] = = 2,63 10-3 -/
P [Mg2+] =3lg2,63 = 3-0,42 = 2,58
99%: [ Mg2+] = = 2,5 10-4 -/
P [Mg2+] = 4lg2,5 = 40,4 = 3,6
99,9%: [ Mg2+] = = 3 10-5 -/
P [Mg2+] = 5lg3 = 50,48 = 4,52
3. PMg . MgY2- [MgY2-] = = = = 0,025 -/
MgY2- = = 17,15 107
17,15 107
= 1,457 10-10
[Mg2+] = = 1,207 10-5 -/
PMg = 5 lg1,207 = 50,08 = 4,92
PMg = 4,92
4. PMg . Mg2+ . PMg , .
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100,1%:[Mg2+] = = 5,83 10-6
PMg = 6 lg5,83 = 60,76= 5,24
101%:[Mg2+] = = 5,83 10-7
PMg = 7 lg5,83 = 70,76 = 6,24
110%: [Mg2+] = = 5,83 10-8
PMg = 8 lg5,83 = 80,76 = 7,24
130%:[Mg2+] = = 1,94 10-8
PMg= 8-lg1,94=8-0,29= 7,71
MgCl2
1. . PH=10 4 PH =8.
MgY2- = 4 MgY2- = 5,4 10-3 4,9 108 =2,646 106
2. PMg . MgY2- [MgY2-] = = = = 0,025 -/
2,646 106
= = 0,9448 10-8
[Mg2+] = = 0,972 10-4
PMg = 4lg0,972 = 4+0,012 = 4,012
PMg = 4,012
3. PMg . Mg2+ . PMg , .
100,1%:[Mg2+] = = 377,9289 10-6
PMg = 6-lg377,9289 = 6-2,57 = 3,43
101%:[Mg2+] = = 37,7929 10-6
PMg = 6-lg37,7929 = 6-1,57 = 4,43
110%:[Mg2+] = = 3,7793 10-6
PMg = 6-lg3,7793 = 6-0,57 = 5,43
130%: [Mg2+] = = 1,26 10-6
PMg = 6-lg1,26 = 6-0,1 = 5,9
0,1% , , 1%.