Ответы и объяснения

2013-11-07T09:16:12+04:00
7 a) KOH+HNO3=KNO3+H20
K+ +OH- +H+ +NO3- =K+ +NO3- +H20
OH- + H+ =H20
б) MgCl2+2NaOH=Mg(OH)2+2NaCl
Mg2+ +2Cl- + 2Na+ + 2OH- =Mg(OH)2 +2Na+ +2Cl-
Mg2+ +2OH- =Mg(OH)2