Question

Hoàn thành các phương trình phản ứng : Fe + O2 --->? K + H2O ---> ? + H2 P2O5 + H2O ---> ? Ba + H2O ---> ? + H2

Answer 1

3Fe + 2O2 -to-> Fe3O4 

K + H2O => KOH + 1/2H2 

P2O5 + 3H2O => 2H3PO4 

Ba + 2H2O => Ba(OH)2 + H2 

Answer 2

\(3Fe + 2O_2 \xrightarrow{t^o}Fe_3O_4\\ 2K + 2H_2O \to 2KOH + H_2\\ P_2O_5 + 3H_2O \to 2H_3PO_4\\ Ba + 2H_2O \to Ba(OH)_2 + H_2\)

Answer 3

\(3Fe+2O_2\Rightarrow Fe_3O_4\)

\(2K+2H_2O\Rightarrow2KOH+H2\)

\(P_2O_5+3H_2O\Rightarrow2H_3PO_4\)
\(Ba+2H_2O\Rightarrow Ba\left(OH\right)_2+H_2\)