g
g = CN V () = 1 74 0,1 = 7,4
= 35 + 39 = 74
= f = 74 1 = 74 /
2. Mg2+: 100 1,0 MgCl2. (20,33030,0010) MgCl27H2O ( ), 1100 , .
g
g = CN V () = 1 213 0,1 = 21,3
= 94 + 119 = 213
= f = 213 1 = 213 /
3. Mg2+ 1,010-1 1,010-6 : 1,010-1 1,010-6 Mg2+ 50 . (. . 2) . 50 , 4.
4
, | ||||||
() | ||||||
Mg 2+: ) 1,0 | 5,0 | |||||
) 1,010-1 | 5,0 | |||||
) 1,010-2 | 5,0 | |||||
) 1,010-3 | 5,0 | |||||
) 1,010-4 | 5,0 | |||||
) 1,010-5 | 5,0 | |||||
1,0 Cl | 5 | |||||
2 | ||||||
Mg 2+, / | 1,010-1 | 1,010-2 | 1,010-3 | 1,010-4 | 1,010-5 | 1,010-6 |
Mg = -lg[Mg 2+] | 1,00 | 2,00 | 3,00 | 4,00 | 5,00 | 6,00 |
4. () ( ). (. .3) , - - , (, ). , ( , ). . . 5, .
5
/ | Mg | , | , | .= = a + Mg |
1,0 2,0 3,0 4,0 5,0 6,0 | -361,4 -394,7 -416,2 -431,1 -445,3 -447,3 | -373,41429 -390,44858 -407,48287 -424,51716 -441,55145 -458,58574 | r = 0,96077 = -356,38000 = -17,03429 n = 6 |
. 5 ( ) = ƒ (Mg). () .
|
|
5. : ) 1. 50 5 , 5 1 Cl, . , . Mg.
6. : Mg2+ (/), , Mg = -lg[Mg2+]. , /, :
Mg2+, / = ̕1000 = 24,3050 10 -4,98524 1000 = 0,251435225,
: 2,51
, Mg; , /, ; 1000 .
():
D. = . = 2,51 24,31 = -21,8.
():
D. = çD.ç *100% / = 21,8*100 / 24,31 = 89,7.
) . 1. 50 5 , 5 1,0 Cl, . 40 100 (1), .
2. 1 MgSO4 0,05 (2).
6
/ | , V, | Mg2+ , ., / | , V., | (1) | (i) | Mg2+ , , / |
1,010-2 | -443,8 | -443,8 | ||||
-439,0 | 0,0002634 | |||||
-436,2 | 0,000265 | |||||
-433,9 | 0,0002441 | |||||
-432,6 | 0,000209 | |||||
-431,2 | 0,0002444 |
3. . 2 , 1 . (i). . 6.
4. : :
; ( 6)
:
1 = 0
2 = 0,000275
3 = 0,0001375
4 = 0,00009
5 = 0,00007
6 = 0,0000125
, /; . , /; ∆ i 1, ; S , .
. ?