[nikita]

I am taking chem lab this semester and i havent done ionic equations or precipitates in a while.  i feel blank!  i just want to make sure i am doing this correctly.  i have 4 reactions and must write the complete ionic equations as well as the net ionic equation.  here is my effort:

1.  Ag₂SO₄(aq)+NaNO₃(aq) ?
no reaction because they are all soluble in water?  eg., AgNO₃ and Na₂SO₄

2.  CaBr2(aq)+Na2SO4(aq)  ?
see reply

3.   Pb(IO3)₂(aq)+NaOH(aq)
Pb²⁺(aq)+2IO₃^-(aq)+Na⁺(aq)+OH^-(aq) Pb(OH)₂(s)+Na⁺(aq)+2IO3^-(aq)
net:  Pb²⁺(aq)+2OH^-(aq)  Pb(OH)₂(s)

4.  K₂SO₄(aq)+BaCl₂(aq) 
2K⁺(aq)+SO₄^2-(aq)+Ba²⁺(aq)+2Cl(aq) 2K⁺(aq)+2Cl^-(aq)+BaSO₄(s)
net:  Ba²⁺(aq)+SO₄^2-(aq) BaSO₄(s)

it was a lot of writing, so i may have missed a charge or a state, but i have them all accurate here.  do it have the jist of it?  i think i do, but i want to make sure.  thanks.

[nikita]

well, i just read in my text that CaSO4 is slightly soluble, but in my lab text it says CaSO4 is insoluble, so I guess I should treat it as insoluble.  so
CaBr2+Na2SO4 Ca²⁺+2Br^-+2Na⁺+SO4_2-   CaSO₄(s)+2Br^-+2Na⁺
net:  Ca²⁺+SO₄²⁺ CaSO4(s)

i literally have like 20 of these to write, so i just want to make sure im on the right track

[Borek]

i literally have like 20 of these to write, so i just want to make sure im on the right track

Seems like you ARE on the right track.

There are no completely insoluble substances, all substances dissolve to some extent. Later you will learn how to qualitatively describe it.

[nikita]

^
thank you.