а) 
ZnSO_4+H_2" alt="Zn+H_2SO_4=>ZnSO_4+H_2" align="absmiddle" class="latex-formula">↑
б) 
FeCl_2+H_2O" alt="FeO+2HCl=>FeCl_2+H_2O" align="absmiddle" class="latex-formula">
в) 
NaBr+HOH(H_2O)" alt="NaOH+HBr=>NaBr+HOH(H_2O)" align="absmiddle" class="latex-formula">
г) 
Cu(NO_3)_2+H_2O" alt="CuO+2HNO_3=>Cu(NO_3)_2+H_2O" align="absmiddle" class="latex-formula">
д) 
2AlI_3+3H_2" alt="2Al+6HI=>2AlI_3+3H_2" align="absmiddle" class="latex-formula">