, . , , . , , .
.
0,1 /
(b2+) = 0,1 /.
, , ( , ).
.
, , . , b2+ .
= ;
. . Lp(BaC2O4) = 1,1×10-7; Lp(CaC2O4) = 2,3×10-9.
Ba2+ + C2O42- BaC2O4¯ Ca2+ + C2O42- CaC2O4¯
Lp(BaC2O4) = [Ba2+]×[C2O42-] , , [C2O42-] ³ Lp(BaC2O4) / [Ba2+]. BaC2O4
S (BaC2O4)= .
= = 4,7∙10-2; . BaC2O4. .
Lp(BaC2O4) / [Ba2+] = Lp(CaC2O4) / [Ca2+]. Lp(CaC2O4) / Lp(BaC2O4) = [Ca2+ ]/ [Ba2+]=0,25. [Ba2+] = 1, 0,25 . 75 % .
, , . . , 10-6 /.
. Mg 10-2 / .
[Mg2+] = 10-2 /
C (Mg(OH)2) = 10-6 /. Mg(OH)2 Mg2+ + 2OH-
Lp(Mg(OH)2) = [Mg2+ ]×[OH-]2 = 8∙10-8 /
[OH-] = (Lp(Mg(OH)2) / [Mg2+ ])1/2
[OH-] = (8∙10-8 / / 10-2)1/2=2,45∙10-3 pOH = 2,61 pH=14-2,61=11,4
[OH-] = (8∙10-8 / / 10-6)1/2=2,8∙10-7
, , , .
CaSO4 + CO32- CaCO3¯ + SO42-
= =4,8∙10-3
= =6,9∙10-5.
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[Ca2+][CO32-] Ca2+ . aSO4 , C32-. , aSO4 C32-.
BaSO4 + Na2CO3 Ba CO3 + Na2 SO4
CO32- , SO42- , . BaSO4 Ba CO3 [Ba2+]1 > [Ba2+]2
[Ba2+]1= [Ba2+]2=
> > =46,4 .