<span>SO2 + 2KOH (конц) = K2SO3 + H2O
</span><span>P2O5 + 3CaO = Ca3(PO4)2
</span><span>MgO + 2HNO3 = Mg(NO3)2 + H2O
</span><span>Fe2O3 + 3H2 = 2Fe + 3H2O
</span><span>CrO3 + Ba(OH)2 = BaCrO4 + H2O</span>
<span>3Fe3O4 + 8Al => 4Al2O3 + 9Fe </span>
Над стрелкой пишешь"2000С"
1)<span> Mg + H2SO4= MgSO4 +H2
</span>2Мg<span> + </span>CO2<span> = </span>C<span> + 2</span><span>MgO
</span>Mg + 2HCl = MgCl₂ + H₂
3) CaO+H2O=Ca(OH)2
M(CaO)=56 г/моль
ню(CaO)=ню(Сa(OH)2)=5,6/56=0,1 моль
Б. ферум ,купрум ,калий хлор 2.
SO3+BaO=BaSO4
Al2O3+3H2SO4=Al2(SO4)3+3H2O
Al2O3+2NaOH+3H2O=2Na[Al(OH)4]