Al(OH)3+3HNO3--->Al(NO3)3+3H2O
Al(OH)3 +3H+ +3NO3- --->Al3+ +3NO3- +3H2O
Al(OH)3 +3H+ --->Al3+ +3H2O
b) 2Fe(OH)3+3H2SO4--->Fe2(SO4)3+6H2O
2Fe(OH)3 +6H+ +3SO4 2- --->2Fe3+ +3SO4 2- +6H2O
2Fe(OH)3 +6H+ --->2Fe3+ +6H2O
c) Mg(OH)2+2HNO3--->Mg(NO3)2+2H2O
Mg2+ +2OH- +2H+ +2NO3- --->Mg2+ +2NO3- +2H2O
2OH- +2H+ --->2H2O