SO2--->SO3---> X --->BaSO4
1)?
2)?
3)?
P2O3 + O2 ---> K3PO4 --->Ca3(PO4)2
1)?
2)?
3)?
Al2(SO4)3 ---> Al(OH)3 ---> X ---> AlCl
1)?
2)?
3)?

Предыдущий
вопрос Следующий
вопрос

For the first reaction pathway: SO2 ---> SO3 ---> X ---> BaSO4
1) X could be either BaSO3 or BaS2O5
2) The final product is BaSO4
3) The overall reaction would be: SO2 + O2 ---> 2SO3; SO3 + Ba(OH)2 ---> BaSO4 + H2O

For the second reaction pathway: P2O3 + O2 ---> K3PO4 ---> Ca3(PO4)2
1) X could be KPO4
2) The final product is Ca3(PO4)2
3) The overall reaction would be: 4P2O3 + 5O2 ---> 2K3PO4; K3PO4 + CaCl2 ---> Ca3(PO4)2 + KCl

For the third reaction pathway: Al2(SO4)3 ---> Al(OH)3 ---> X ---> AlCl
1) X could be Al2O3 or Al2O3•2H2O
2) The final product is AlCl3
3) The overall reaction would be: 2Al2(SO4)3 + 6NaOH ---> 2Al(OH)3 + 3Na2(SO4); Al(OH)3 + HCl ---> AlCl3 + 3H2O