Question

A student analyzed an unknown sample that contained a single anion. The sample gave a white precipitate upon addition of a solution of AgNO3 which dissolved in ammonia. Which anion is present in the unknown solution? Write the corresponding net ionic equation.

Answer 1

The unknown anion in the solution is chloride (Cl-) based on the formation of a white precipitate with silver nitrate (AgNO3). The net ionic equation is Cl- (aq) + Ag+ (aq) → AgCl (s).

Step-by-step explanation:

The unknown anion present in the solution can be identified by the reaction with silver nitrate (AgNO3) and ammonia (NH4OH). The formation of a white precipitate upon addition of AgNO3 indicates the presence of chloride ions (Cl-). The net ionic equation for the reaction is:

Cl- (aq) + Ag+ (aq) → AgCl (s)

Answer 2

Chloride ion

Step-by-step explanation:

The anion present in the unknown solution would be chloride ions.

A white precipitate of silver chloride is usually formed when drops of silver nitrate are added to a solution containing chloride ions. The ionic equation is as below:

`Cl^- (aq) + Ag^+ (aq) --> AgCl (s)`