Precipitation Possibilities

Question

Determine if a a precipitate forms when the following 1.00M solutions are mixed. Provide the molecular equation, ionic equation and the net-ionic equation if one forms.

a.) Barium Chloride and Sodium Sulfate

b.) Sodium Hydroxide and Iron (III) Nitrate

c.) Copper (II) Chloride and Sodium Sulfide

d.) Strontium Nitrate and Lithium Carbonate

Answer 1

a) BaCl₂(aq) + Na₂SO₄(aq) ==> BaSO₄(s) + 2NaCl(aq) ... molecular equation - Yes, a ppt forms

Ba²⁺(aq) + 2Cl-(aq) + 2Na⁺(aq) + SO₄^2-(aq) ==> BaSO₄(s) + 2Na⁺(aq) + 2Cl-(aq) ... ionic equation

Ba²⁺(aq) + SO₄^2-(aq) ==> BaSO₄(s) ... net ionic equation

b) 3NaOH(aq) + Fe(NO₃)₃(aq) ==> Fe(OH)₃(s) + 3NaNO3(aq) ... molecular equation - Yes, a ppt forms

You should be able to write the ionic equation.

The net ionic would look like this: Fe³⁺(aq) + 3OH-(aq) ==> Fe(OH)₃(s)

c) CuCl₂(aq) + Na₂S(aq) ==> CuS(s) + 2NaCl(aq) ... molecular equation - Yes, a ppt forms.

You should be able to write the ionic equation

The net ionic would be Cu²⁺(aq) + S^2-(aq) ==> CuS(s)

d) Sr(NO₃)₂(aq) + Li(CO₃)₂(aq) ==> SrCO₃(s) + 2LiNO₃(aq) ... molecular equation - Yes, a ppt forms

Try writing both ionic and net ionic using the above examples as a guide.