Question

1)Al->Al2O3->Al(NO3)3->Al(OH)3
2)Zn+HCl->
3)Na+H2O->
4)FeSO4+Mg->

Answer 1

$1. Al-Al _{2} O _{3} -Al(NO _{3} ) _{3} -Al(OH) _{3} \ \ 1) 4Al+3O _{2} =2Al _{2} O _{3} \ 2) Al _{2} O _{3} +6HNO _{3} =2Al(NO _{3} ) _{3} +3H _{2} O \ 3) Al(NO _{3} ) _{3} +3NaOH=Al(OH) _{3}+3NaNO _{3} \ \ 2. Zn+2HCl=ZnCl _{2} +H _{2} \ \ 3. 2Na+2H _{2} O=2NaOH+H _{2} \ \ 4. FeSO _{4} +Mg=MgSO _{4} +Fe$