Question

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

Answer 1

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) 

 

Answer 2

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