1)а)koh+ba(no3)2=k(no3)2+ba(oh)2
б)niso4+(nh4)2s=nis+(nh4)2so4
в)pb(no3)2+2kcl=pbclw-2kno3
г)cucl2+na2s->cus+2nacl
cu(2+)+2cl(-)+2na(+)+s(2-)->cus+2na(+)+2cl(-)
cu(2+)+s(2-)->cus
2)а)ch3coona+hcl=ch3cooh+nacl
ch3coo(+)+cl(-)+ch3cooh
ch3coo(-)+h(+)=ch3cooh
б)bacl2+na2cro4=bacro4+2nacl
ba(+2)+2cl(-)+2na(+)+cro4(2-)=bacro4+2na(+)+2cl(-)