Write the correct formula of the predicted products and add the state to each formula.

Question

1. KClO4 (aq) + BaCl2 (aq)
2. Pb(NO3)2 (aq) + LiBr (aq)
3. KNO3 (aq) + AgC2H3O2 (aq)
4. Na2CO3 (aq) + KCl (aq)
5. Li3PO4 (aq) + BaS (aq)
6. (NH4)2SO4 (aq) + CaCl2 (aq)
7. Fe(C2H3O2)3 (aq) + KOH (aq)

Does a precipitation reaction occur?

Answer 1

I'll do a few, and hopefully you can get the idea and do the remainder.

1. 2KClO4 (aq) + BaCl2 (aq) => 2KCl(aq) + Ba(ClO4)₂ (aq) No precipitate. All are soluble (aq).
2. Pb(NO3)2 (aq) + 2LiBr (aq) => 2LiNO3(aq) + PbBr2(s) Yes a precipitate of PbBr2 forms
3. KNO3 (aq) + AgC2H3O2 (aq) => KC2H3O2(aq)+ AgNO3(aq) No precipitate. All are soluble (aq)

For the others you'll need to know (or look up) the solubility rules to determine if any of the products are insoluble (s). If not, then there is no precipitate and no reaction.