Question

№2 Дописать УР: NaOH + HNO3= Fe(OH)2 + H2SO4= Cu(NO3)2+KOH= Fe(OH)2= MgSO4+NaOH= Al2(SO4)2 + NaOH=

Answer 1

2NaOH + 2HNO3=2 NaNO3 +2H2O
2Fe(OH)3+3H2SO4=Fe2(SO4)3+6H2O
Cu(NO3)2+2KOH=Cu(OH)2 ↓+ 2KNO3   
Fe(OH)2= FeO + H2O
MgSO4+2NaOH=Mg(OH)2↓ + Na2SO4 
Al2(SO4)2 + 6NaOH=2Al(OH)3 + 3Na2SO4  
или
Al2(SO4)3+8NAOH =2Na[Al(OH)4] +3Na2SO4