NH4+ NaOH .
(( HCl)=2,0 /3) . , (w=0,5%) PbCl2. () AgCl, Hg2Cl2, PbCl2, .
() Ba2+, Sr2+, Ca2+, Pb2+ (), K+, Na+ NH4+. (NH4)2SO4, 5-6., 10. . (), BaSO4, SrSO4, CaSO4 (), PbSO4 (). () (w=30%) PbSO4, :
2PbSO4 + 23NH4 [Pb(3)2PbSO4] + (NH4)2SO4.
³ () BaSO4, SrSO4, CaSO4 , , , (( 23)=10,0 /3) 5-10 . . 23 . , , . ϳ , , , . 23 SO42.
(V) Ba2+, Sr2+, Ca2+ .
() Ba2+, Sr2+, Ca2+ BaSO4, SrSO4, CaSO4 K+, Na+, NH4+ Ca2+.
Ca2+ Ca2+, , .
() Ca2+, Ca2+ 23. 3 , Na+, NH4+, - .
+ () Ca2+ Na23. 3 . NH4+. + Na3[Co(NO2)6]. ( NH4+) +.