6. (/, /) 24 , 2+ 100 .
. 24 :
24↓ D 2+ +
. I 0, , :
= [2+] [ ]
[1; 2, . 6] , 2,57 ∙ 109.
24 /. 24 2+ x . , :
= [2+] [ ] = ∙ = 2,57 ∙ 109
x 2 = 2,57 ∙ 109
x = = 5,1 ∙ 105 /.
, 24 5,1 ∙ 105 /.
(/) (/) 24 (/):
2+ 24 , :
2+ :
100 24:
:
:
1000 2,0 ∙ 103 ;
100 x ;
x = 2,0 ∙ 103 ∙100 /1000 = 0,0002 .
( )
:
1) I, ( ).
2) [1; 2, . 1, 2] (1.4), (1.5), (1.6) , .
3) , , . [1; 2, . 6] .
4) .
7. 0,01 Ca(NO3)2.
. 0,1 / Ca(NO3)2, 1:
I = 0,03 /.
Ag+ Cl. [1; 2, . 1, 2] 0,03 /, Ag+ (1.5), 0,01 < I < 0,1 /:
- Cl Ag+, :
, AgCl, AgCl:
|
|
AgCl↓ D Ag+ + Cl
x / [1; 2, . 6] AgCl:
, AgCl:
8. Ba3(AsO4)2 0,05 KNO3.
.
1. 0,05 KNO3:
KNO3 K+ + NO3 Þ
(K+) = C (KNO3) = 0,05 / (α = 1 n = 1)
C () = C (KNO3) = 0,05 / (α = 1 n = 1)
(0,05 ∙ 12 + 0,05 ∙ 12) = 0,05 /.
2. [1; 2, . 2] Ba2+ AsO43 I = 0,05 /:
3. , Ba3(AsO4)2, Ba3(AsO4)2. [1; 2, . 6] Ba3(AsO4)2, 7,8 1051:
Ba3(AsO4)2↓ D 3Ba2+ + 2AsO43
Ba3(AsO4)2 x /. :
[Ba2+] = 3 x /
[AsO43] = 2 x /
Ba3(AsO4)2:
, x:
0,125 0,0441 27 x 3 4 x 2 = 7,8 1051 Þ
x 5 = 1,31 1050 Þ
1,1 1010 /
, Ba3(AsO4)2 0,05 KNO3 1,1 1010 /.