Silver Precipitates

Hazards

Avoid contact with silver compounds as they will stain skin and clothing.

Chemicals and Solutions

• 0.1 M Na₂CO₃ (1 mL)
• 0.1 M AgNO₃ (10 mL)
• 0.1 M NaOH (10 mL)
• 0.1 M NaCl (30mL)
• 5 M NH₃ (35 mL)
• 0.1 M NaBr (10 mL)
• 0.1 M Na₂S₂O₃ (50 mL)
• 0.1 M KI (10 mL)

Materials

• 600 mL beaker
• 200 mL water
• Magnetic stirrer and bar

Procedure

1. Add 200 mL water and a stirring bar to the 600 mL beaker and begin stirring.
2. Starting with 1 mL of sodium carbonate add the solutions consecutively to the water in the order listed in the materials section. Precipitates will form and disappear.

Discussion