Question

Химия, нужно позарез!

Answer 1

$1)Al _{2} O _{3} +3H _{2} =2Al+3H_{2} O \\ 2)2Al+6HCl _{2} =2AlCl_{3} +3H _{2} \\ 3)AlCl_{3}+3KOH =Al(OH) _{3} +3KCl \\ 4)Al(OH)_{3} +3HCl=AlCl _{3} +3H _{2} O \\ 5)4Al+3O _{2} =2Al_{2} O _{3} \\ 6)Al _{2} O _{3} +6HCl=2AlCl _{3}+3H _{2} O \\ 7)Al_{2} O _{3} +Na _{2} O=2NaAlO_{2}$

Answer 2

1) Al2O3+3H2=2Al+3H20
2) 2Al+6HCl=2AlCl3+3H2
3) AlCl3+3NaOH=Al(OH)3+3NaCl
4)Al(OH)3+3HCl=AlCl3+3HOH
5)4Al+3O2=2Al2O3
6)Al2O3+2NaOH=2NaAlO2+H20