, , . . ?
.
(+3). :
Al(NO3)3 + 3KOH = Al(OH)3 + 3KNO3,
Al3+ + 3NO + 3K+ + 3OH = Al(OH)3 + 3K+ + 3NO ,
Al3+ + 3OH = Al(OH)3¯,
Bi(NO3)3 + 3KOH = Bi(OH)3 + 3KNO3,
Bi3+ + 3NO + 3K+ + 3OH = Bi(OH)3 + 3K+ + 3NO ,
Bi3+ + 3OH = Bi(OH)3¯.
. :
Al(OH)3 + KOH = K[Al(OH)4].
.