Bài 1 : Hoàn thành các phương trình
1, Pb + 2HCl \(\rightarrow\)PbCl2 + H2\(\uparrow\)
2, PbO + H2SO4 \(\rightarrow\)PbSO4 + H2O
3, Ba + H2SO4 \(\rightarrow\)BaSO4\(\downarrow\) +H2\(\uparrow\)
4, Ba + 2HCl\(\rightarrow\)BaCl2+H2\(\uparrow\)
5, K + H2O \(\rightarrow\)KOH + H2 \(\uparrow\)
6, Na + H2O \(\rightarrow\) NaOH + H2 \(\uparrow\)
7, 3Fe + 2O2 \(\underrightarrow{t^o}\) Fe3O4
8, 2Al(OH)3 \(\underrightarrow{t^o}\) Al2O3 + 3H2O
9, 2Fe(OH)3 \(\underrightarrow{t^o}\) Fe2O3 + 3H2O
10, Ca(OH)2 + CO2 \(\rightarrow\)CaCO3 + H2O