Question

A solution contains AgNO3 and Ba(NO3)2. What substance could be added to the solution to precipitate Ag ions, but leave Ba2 ions in solution

Answer 1

Answer:

A salt containing chloride ions or hydrochloric acid.

Explanation:

Hello,

In this case, by adding a chloride-based salt or hydrochloric acid, precipitation of silver chloride could be attained by cause of its neglectable solubility in water as shown below:

$Ag^+(aq)+Cl^-(aq)\rightarrow AgCl(s)$

Moreover, barium chloride is highly soluble in water, for that reason it remains in aqueous solution as specified:

$Ba^{2+}(aq)+2Cl^-(aq)\rightarrow BaCl_2(aq)$

$BaCl_2(aq)\rightarrow Ba^{2+}(aq)+2Cl^-(aq)$

Best regards.