Câu 3:
$H_2+Cl_2\buildrel{{á/s}}\over\longrightarrow 2HCl$
$2Al+3Cl_2\buildrel{{t^o}}\over\longrightarrow 2AlCl_3$
$Cu+Cl_2\buildrel{{t^o}}\over\longrightarrow CuCl_2$
$2FeCl_2+Cl_2\buildrel{{}}\over\longrightarrow 2FeCl_3$
Câu 4:
$MnO_2+4HCl_{đ}\buildrel{{t^o}}\over\longrightarrow MnCl_2+Cl_2↑+2H_2O$
$2KMnO_4+16HCl\buildrel{{}}\over\longrightarrow 2MnCl_2+2KCl+5Cl_2↑+8H_2O$
Câu 5:
$2NaCl+2H_2O\buildrel{{đpdd,cmn}}\over\longrightarrow 2NaOH+Cl_2+H_2$
