1)Реагирует с SO2
<span><span>SO2</span>+<span>H2O</span>=<span>H2SO<span>3
2)Реагирует с Na
</span></span></span>2Na + 2H2O = H2<span> + 2NaOH
</span><span>3)Реагирует с P2O3
</span><span>Р2O3+3Н2O=2Н3РO3</span><span>
</span>
Al2O3+5HBr -> 2AlBr3+3H2O
Al2O3+5LiOH->2Al(OH)3+3Li2O
2Fe2O3-->4Fe +3O2
97,5------X
320------224
X=68,5