$$\begin{gathered} \mathrm{a}, \mathrm{Td} \mathrm{với} \mathrm{dd} {\mathrm{H}}_2{\mathrm{SO}}_4 \mathrm{loãng} \\ \mathrm{Mg}+{\mathrm{H}}_2{\mathrm{SO}}_4->{\mathrm{MgSO}}_4+{\mathrm{H}}_2 \\ \mathrm{Fe}+{\mathrm{H}}_2{\mathrm{SO}}_4->{\mathrm{FeSO}}_4+{\mathrm{H}}_2 \\ \mathrm{Zn}+{\mathrm{H}}_2{\mathrm{SO}}_4->{\mathrm{ZnSO}}_4+{\mathrm{H}}_2 \\ \mathrm{b}, \mathrm{Td} \mathrm{với} \mathrm{dd} {\mathrm{FeCl}}_2 \\ \mathrm{Mg}+{\mathrm{FeCl}}_2->{\mathrm{MgCl}}_2+\mathrm{Fe} \\ \mathrm{Zn}+{\mathrm{FeCl}}_2->{\mathrm{ZnCl}}_2+\mathrm{Fe} \\ \mathrm{c}, \mathrm{Td} \mathrm{với} \mathrm{dd} {\mathrm{AgNO}}_3 \\ \mathrm{Mg}+2{\mathrm{AgNO}}_3->\mathrm{Mg}{\left({\mathrm{NO}}_3\right)}_2+2\mathrm{Ag} \\ \mathrm{Fe}+2{\mathrm{AgNO}}_3->\mathrm{Fe}{\left({\mathrm{NO}}_3\right)}_2+2\mathrm{Ag} \\ \mathrm{Cu}+2{\mathrm{AgNO}}_3->\mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2+2\mathrm{Ag} \\ \mathrm{Zn}+2{\mathrm{AgNO}}_3->\mathrm{Zn}{\left({\mathrm{NO}}_3\right)}_2+2\mathrm{Ag} \end{gathered}$$..

. .straight a comma space Td space với space dd space straight H subscript 2 SO subscript 4 space loãng
Mg plus straight H subscript 2 SO subscript 4 minus greater than MgSO subscript 4 plus straight H subscript 2
Fe plus straight H subscript 2 SO subscript 4 minus greater than FeSO subscript 4 plus straight H subscript 2
Zn plus straight H subscript 2 SO subscript 4 minus greater than ZnSO subscript 4 plus straight H subscript 2
straight b comma space Td space với space dd space FeCl subscript 2
Mg plus FeCl subscript 2 minus greater than MgCl subscript 2 plus Fe
Zn plus FeCl subscript 2 minus greater than ZnCl subscript 2 plus Fe
straight c comma space Td space với space dd space AgNO subscript 3
Mg plus 2 AgNO subscript 3 minus greater than Mg open parentheses NO subscript 3 close parentheses subscript 2 plus 2 Ag
Fe plus 2 AgNO subscript 3 minus greater than Fe open parentheses NO subscript 3 close parentheses subscript 2 plus 2 Ag
Cu plus 2 AgNO subscript 3 minus greater than Cu open parentheses NO subscript 3 close parentheses subscript 2 plus 2 Ag
Zn plus 2 AgNO subscript 3 minus greater than Zn open parentheses NO subscript 3 close parentheses subscript 2 plus 2 Ag
.