1.Mg + pb(no3)2=Mg(No3)2+Pb
MG+PB+2NO3=MG+2NO3+PB
2.fecl3+3naoh=fe(oh)3+3nacl
FE+3CL+3NA+3OH=FE(OH3)+3NA+3CL
3.cas+2hcl=cacl2+h2s
CA+S+2H+2CL=CA+2CL+2H+S
4.baco3+h2so4=baso4+co2+h2o
BACO3+2H+SO4=BASO4+C+2O+H20
5.3zncl2+2k3po4=3zn3po4+6kcl
3ZN+6CL+6K+2PO4=3ZN3PO4+6K+6CL