Na2S+HCL=NaCL+H2S Ba (NO3) 2+Na2SO4=BaSO4+NaNO3 Pb (NO3) 2+Na2S=PbS=NaNO3 полное и сокращенное ионное уравнение

Na2S+HCL=NaCL+H2S

+ 2 - + - + -

2Na + S + H + Cl=Na + Cl+H2S

2 - +

S + H = H2S

Ba (NO3) 2+Na2SO4=BaSO4+NaNO3

2 + - + 2 - + -

Ba + 2NO3+2Na+SO4=BaSO4+Na+NO3

2 + 2-

Ba + SO4=BaSO4

Pb (NO3) 2+Na2S=PbS=NaNO3

2 + - + 2 - + -

Pb+2NO3+2Na+S=PbS+Na+NO3

2 + 2-

Pb+S=PbS

Na2S+2HCL=2NaCL+H2S

2Na+S+2H+2Cl=2Na+2Cl + 2H+S

S+2H=H2S

Ba (NO3) 2+Na2SO4=BaSO4+2NaNO3

Ba+2 NO3+2Na+SO4=BaSO4+2Na+2NO3

Ba+SO4=BaSO4 (осадак)

Pb (NO3) 2+Na2S=PbS=2NaNO3

Pb+2NO3+2Na+S=PbS+2Na+2NO3

Pb+S=PbS (осадок)