Chemistry 30

For each of the following,

• predict the products of the double displacement reaction and write a balanced equation.
• use a table of solubilities to predict whether or not a precipitate forms. Identify any precipitates in your balanced equation (part a); also identify products that remain in solution.
• if a precipitate occurs, write a balanced net ionic equation for the reaction.

CuSO_{4 (aq)} + NaOH_(aq)

CaS_(aq) + (NH₄)₃PO_{4 (aq)}

MgBr_{2 (aq)} + H₂SO_{4 (aq)}

We wish to separate the cations from a mixture containing the following solutions:

Ra(NO₃)₂, Mg(NO₃)₂, and AgNO₃

In order to do so we are given the following separate solutions:

K₂SO₄, K₂S, and KOH

In what order should we add the separate solutions in order to remove the cations by selective precipitation? List the precipitates that form, in the proper order.