Precipitating Sodium Chloride From Its Solution
Description: When concentrated HCl is added to a saturated solution of sodium chloride, a white precipitate forms. When water is added to the mixture, the precipitate redissolves. The addition of HCl shifts the equilibrium of chloride ions in solution.
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Solubility product, Hydrochloric Acid, Common Ion Effect, Precipitation, Equilibrium
Rating: 
Hazard: Some
- Skin corrosion hazard
- Serious eye damage
- Inhalation hazard
- Corrosive to metals
Effectiveness: Good
- Clear contrast between behavior of systems
- Good connection from demo to course material
- Low failure rate
- Time to results is low
- Primary effects are observed
Difficulty: Low
- Simple addition of reagents
- Simple manipulations for most to perform
- Use of strong acid
Safety Precautions:
- Eye protection required
- Gloves required
- Perform in a well-ventilated area
- Avoid exposure to gases, mists and vapors
- Absorbent materials on hand
- Sodium bicarbonate on hand
Class: Aqueous Equilibrium and Precipitation Reactions, Dissociation and Solubility
Division: General, Analytical Chemistry
Home| General Chemistry Demonstrations| Analytical Chemistry Demonstrations