Question

Al2O3 -> Al2(SO4)3 -> Al(OH)3 -> KAlO2 = Al2O3

Answer 1

1) Аl2O3 + H2SO4 = Al2(SO4)3 + H2O
2) Al2(SO4)3 + 6KOH = 2Al(OH)3 + 3K2SO4
3)Al(OH)3 + KOH = KAlO2 + 2H2O
4) KAlO2 + H2O = Al2O3 + K + H2